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01: Which watch brand is right for me?

For some people, the brand is of the utmost importance, as with anything in life; the famous brands have built up powerful associations with them of history, reputation and prestige. Similar to the major car manufacturers, people can be loyal to their favourite watch manufacturer for the above reasons.

What goes into the price of a watch is more than just the sum of the raw material costs. The price will include the hours of work by top designers that has gone into creating it, you are paying for the quality workmanship involved and you are also paying for added value of the prestige of owning an exclusive brand name.

02: Why should I spend so much on a wristwatch?

Even after the fantastic savings that are available on this site, a watch can still be a considerable investment for a lot of people.

Originally, a fine crafted precision mechanical wristwatch was only available to wealthy people in high society who could afford to pay these master craftsmen for their skill. It was not until the quartz revolution in the 1970’s that a wristwatch finally became affordable to the masses (similar to the way that microprocessors have made computing power available to be put into almost anything that can be thrown away). These days you can buy a cheap digital watch can cost less that £30 that can tell the time even more accurately and has all the functions than a more expensive automatic watch so the question is what is the point in paying more money for a watch?.

The simple fact is that the prestigious watches are considered more reminiscent of fine jewellery than just a device for telling the time. People will attach high emotional values to such fine masterpieces of design and beauty. A treasured timepiece can be handed down from generation to generation.

When buying a prestige watch you are buying an investment in a high precision timepiece with jewellery value.

03: Why do mechanical watches cost a lot more than the quartz equivalent?

You will find that a lot of the luxury brands such as Omega and TAG Heuer will offer the same watch but with different movements. You’ll find also that the prices for mechanical watches are more expensive than the quartz models also.

Normally, the reasons why a mechanical watch is generally more expensive than the quartz equivalent are as follows:

1) Manufacturing cost. A mechanical watch contains more moving precision parts than a quartz watch so the price of design, manufacturing costs and extra labour required is factored in.

2) Distribution costs: For the general consumer, most will still prefer the convenience of a quartz battery watch. As such due to the scale of economics a mechanical watch are likely to be sold in fewer quantities so a higher price is required to cover the costs of stocking the items for a longer time.

3) Warranty Repair cost: As a mechanical watch contains many more parts than a quartz watch; any repairs that a mechanical watch requires could involve a lot more work and more possibility of different parts needing to be replaced. This warranty cost will be factored into the final price.

4) Exclusivity:
For the serious watch collector, a quartz watch will not be as highly sought after as a mechanical watch as a quartz watch will be sold in greater quantities. Additionally for watch enthusiasts a mechanical watch is considered an evolution of hundreds of years of inspiration, innovation and elegant design which has been precisely engineered to within micro-tolerances. Most watch collectors will look for purely mechanical timepieces to add to their collections.

04: What are the differences between the types of movements?

This is a major consideration when buying a watch as it specifies how the watch keeps the time. There are two common types of movement that are used: automatic and quartz battery, other movements that are less common are also explained in this FAQ.

Automatic (self-winding) movement

This type of watch is a high precision all-mechanical watch with a rotating counter-weight (rotor) that winds up the internal main-springs with the movement of your wrist. This means that this type of watch does not require batteries or winding daily and if well maintained can be handed down generation to generation.

Automatic self-winding watches are known for the elegance of the “sweep-hand” movement of the watches seconds hand (The seconds hand appears to rotate in one smooth clockwise motion as opposed to the ticking of a quartz watch)

Some models feature what is known as a "see-through crystal skeleton case back” which allows you to see the mechanism at work from the back of the case.


Disadvantages for this type of watch are as follows:

1) This watch requires a regular service done around every 3 to 5 years to ensure all the mechanics function normally. This can be done in your manufacturers local service centre located in the warranty booklet provided with each watch or you can contact us for advice.

2) This type of watch needs to be worn daily to insure that the watch is fully powered. If not worn for a period of time (usually around 2 days) then you need to manually wind up the mechanism again by the crown and reset the time.

3) As it is a mechanical device it is slightly less accurate than a quartz watch. Depending on the individual watch model the average daily error could be up to +/- 30 seconds. This figure will be less if it is a "Chronometer" certified watch which is a precision watch that is tested in various temperatures and positions, thus meeting the accuracy standards set by C.O.S.C. in Switzerland. These watches are usually provided with a chronometer certificate detailing specific test results by the C.O.S.C.

4) Due to the higher number of parts compared to a quartz watch extra care must be taken to prevent shocks that can affect the timing of the watch.

Most automatic watches can currently hold around 30 to 40 hours power reserve before it stops. To get it start again you need to shake the watch side to side to rotate the rotor or you can manually wind it up using the crown.

Quartz (battery) movement

This is a type of movement that uses the vibrations of a tiny quartz crystal to maintain a consistently high timing accuracy. The power comes from a battery that must be replaced about every 2-3 years.

With a quartz watch the rate of error can be as little as 15 seconds out per month. As this type of movement contains less moving parts than a mechanical watch it is generally more reliable as well as there are less parts to break down.

This type of watch is convenient as it will continue running even if not worn for a long period. As comparison, an automatic mechanical watch needs to be worn daily in order to provide enough power for the movement.

Mechanical hand-winding movement

This is the oldest type of mechanical watch that requires you to wind the crown daily in order to provide power for the watch to move. This type of movement is not very common now.

Quartz (battery-less) hybrid movement

A recent advance in watch technology has created a new quartz hybrid watch that enables the watch to recharge the battery using body motion so a battery change is not required.

Using a similar pendulum-rotor mechanism in an automatic self-winding mechanical watch, this generates the power for the watch (which is stored inside a lithium battery) whilst the timing element is then controlled using a piezoelectric quartz crystal. Such movements aim to combine the advantages of both quartz and mechanical watches.

Typically these watches will have the accuracy of a quartz watch (with the ticking seconds-hand motion of quartz watches) and the power reserve can be generally be measured in months as opposed to 30 to 40 hours power reserve for a mechanical automatic watch.

An example of this technology is used in the Seiko Kinetic series, for Swiss manufacturers they are called “Autoquartz” movements.

Advantages of this system over standard quartz watches are:

1) No battery changes are required. The biggest inconvenience with owning standard quartz watches is that the battery requires a change every 2to 3 years. You need to take the watch to a watch shop or send the watch off to a repair centre incurring costs and the loss of use of your watch during the battery change. For a quartz hybrid you will not need to do this except have a service performed when required. Since the battery does not need to be changed this eliminates problems that can occur when the case is opened (e.g. lust or dirt getting into the mechanism or damage to the water-resistant seal when a battery is changed)

2) Another major advantage of Kinetic technology is that it is environmentally friendly. Kinetic watches use clean, natural energy - the motion of the wearer's arm - to generate electricity.

Consequently there are no polluting watch batteries to dispose of as there are with standard quartz watches.

Eco Drive – Solar Power

Eco-Drive watches made by Citizen are powered purely by exposure to sunlight or indoor light. Eco-Drive watches uses a technologically advanced solar conversion process to recharge the internal battery that powers the Japanese made quartz precision movement.

05: How can I check if the watch is the right size and weight for me?

When it comes to buying your watch you will want to know if the watch is comfortable to wear and if it looks right on your wrist. On our descriptions you can find the case size and weight to help you decide on the correct watch for you.

Gents case size:

The normal case size for gents is 40mm width (excluding the crown) the majority of gents watches will be around this size for round style dials. This is suitable for the average male wrist.. Larger watches can be from 41-44mm and anything 45mm and over is considered oversized, whilst smaller watches can go down to as small as 34mm (often called unisex or mid-sized watches).

Typically quartz watches will be around 10mm thickness. Whilst standard automatic watches will be generally slightly thicker 11mm to 12mm to accommodate the extra parts. Extra functions or complications will add further thickness.

Gents Watch Weight:

For watches they normally weigh from the lightest 25g to 250g for the heaviest watches. Automatics will generally weigh more than quartz due to the extra mechanical elements. Additionally, watches with extra complications will weigh more and be thicker than standard watches.

If you prefer a lighter watch then pick the following features if possible:

  • Standard watch instead of watches with complications (e.g. chronograph, moonphases)
  • Choose the quartz version instead of automatic
  • Metal bracelets will be on average 50g heavier than the equivalent model in leather strap or rubber strap.
  • Titanium models are up to 30% lighter than the equivalent steel model
  • Watches with high water resistance (i.e. 500m and over) will have thicker reinforced cases to withstand the higher pressure generated by wearing the watch at these depths

Please refer to the following table for a list of typical watch weight ranges for gents watches with the typical watch which falls in that weight range.

Weight Range Watch type (Automatic)

Watch type (Quartz)

25g - 50g

Not possible normally

Very thin with leather strap (standard watch)

50g - 75g

Thin case with leather strap (standard watch)

Thin watch with leather / rubber strap

75g - 100g

Medium-size watch with standard functions and leather / rubber strap

Medium-size watch with standard functions and rubber / leather strap

100g – 125g

Medium-size watch with standard functions and leather / rubber strap

Medium-size watch with standard functions and metal bracelet.


Medium-size watch with standard functions and metal bracelet

Thicker-size with extra functions and metal bracelet.


Thick watch with complications and metal bracelet

Extra thick watch with metal bracelet


Extra- thick watch with complications and metal bracelet (usually with high water resistance or extra complications)

Not normally available


Ladies watch sizes and weights

Watches for women are usually designed to be as light as possible and the average case size will vary from 25mm to 30mm width for round watches. Anything bigger than 30mm is considered a large sized watch for ladies.

Smaller jewellery type watches designed for style can be as narrow as 12mm to 17mm.

06: What details should I look for on the watch dials?

Dial Colour

The dial colour of the watch is a matter personal preference. For most watches the same model will be available in several different colour choices (usually black, white or silver). Depending on the manufacturer and gender, there maybe additional colours to choose from also.

Gents choices usually include: black, white, silver and blue

For ladies there will be generally be the similar to gents but sometimes feature a few more choices available such as pink, green, champagne gold, etc.

Some of the more expensive watches are available with a “Mother-of-Pearl” dial, this refers to a dial made with an iridescent milky interior shell of the freshwater mollusc that is sliced thin and used on watch dials. Most mother-of-pearl dials have a white milky lustre but they can also come in a variety of other colours such as blue, grey blue, pink, green and black

Dial Shape

Generally watch dials will come in the following shapes: round, tonneau, rectangular, square, and oval. This is due to the restriction of producing the crystals in difficult shapes

Hour markers / Numerals

Watches with analogue dials will feature hour markers a way to show the time using hands and the dial. Simple designs will only show the hours whilst more complicated designs will have smaller intervals additionally marked off to show the seconds and minutes.

Here are the common types of hour makers used on watch dials:

Indices / Hour Markers: This is a simple type of system where the hours are indicated by a hand-applied steel dots or rectangles pointing towards the centre of the dial. For more expensive watches, some manufacturers will use a number of diamonds instead of steel.

Roman numerals: refers to a numbering system using the following characters I, II, III, IIII, V, VI, VII VIII, IX, X, XI, XII. Watches with a classic design will usually feature this type of system.

Arabic numerals: refers to using a numbering system that is currently used in modern times. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.


Watches can also have a combination of indices and numerals depending on the design style of the manufacturer.

Luminous markers and hands (for reading the dial in the dark)

Some watches feature luminous hands and markers which enable you to see the hands and dial markings in areas of low-light. Normally the dial and hands will be treated with a luminous paint that absorbs sunlight during the day, when there is insufficient light the energy stored in the paint is emitted as luminescent light. Over the course of time the luminosity will gradually diminish as the energy is used up.

Tritium self-powered gas lights

This is a special technology developed by Ball Watches. This provides superior long-life brightness 100 times brighter than the current markings using luminous paint and has a lifespan of around 25 years. It works without recharging from the sun or using draining batteries so you can read the dial easily in the brightest daylight or deepest night.

What is a “guilloché'” dial?

The term 'guilloché' is a French term that means 'engine-turned'. This word is often used in watch making to describe a technique for engraving a particular type of ornamental pattern on an object (usually the dial or case back). Generally this design consists of sets of intricate wavy and interlacing lines that cross at regular intervals as opposed to a plain flat dial with no detail.


Some watches will feature sub-dials which are found in watches with complications such as chronograph, moon phase, power reserve, etc. Occasionally sub-dials can be found on standard watches e.g. seconds or calendar subdials replacing the centre seconds hand and calendar date window respectively.

07: What are the different types of cases and materials that are available?

Stainless Steel

Modern watch cases are now usually made of stainless steel. This is an extremely durable metal alloy that is virtually immune to rust, discolouration, and corrosion.

When designing watch cases the manufacturer will choose from two types of finishes in order to enhance the aesthetics of the watch:

Fine-brushed: The case will be smoothed then a machine will be used to apply a fine brush effect on the case. The effect of this will be equivalent to a matt-type paint finish.

Polished: This type of finish will appear to be smooth and light-reflective (like a mirror). Similar to a gloss-type paint finish.

The watch manufacturers will sometimes finish different sides of the case and bracelets with alternating finishes to enhance the look of the watch


Watches that are described as gold are usually made with stainless steel casing then coated with a 10 micron layer of gold plating. This will usually last the lifetime of the watch. Normally expect around 15% extra cost compared to the stainless steel versions of the same watch.

Solid gold watches are even more expensive (costing well over £1000) and the choice of models will be generally limited to a few exclusive designs.


A hard metal having a silver-grey appearance similar to stainless steel but it is 30 percent stronger and 50 percent lighter than steel. Sometimes manufacturers will offer the same model in steel and titanium versions. As a general rule the titanium models will be lighter but cost more than the stainless steel equivalent.

It has high resistance to salt water corrosion so it makes it particularly useful in divers watches.

Titanium is also hypoallergenic so that people with a nickel or steel allergy can wear titanium watches safely.


This is one of the most precious metals in the world. Platinum also is one of the strongest and heaviest making it a popular choice for setting gemstone jewellery and high value luxury watches. Platinum is also hypoallergenic and tarnish resistant.

PVD Coating

A metal watch case can also coated using a technique called PVD (Physical Vapour Disposition) al in order to provide a different case colour (usually black or gold). Such coatings are highly resistant to buffing and should last the lifetime of the watch. 

08: What is a bezel?

The bezel generally refers to the upper top part of the watchcase surrounding the dial and crystal. They can be non-moving (fixed) or rotating depending on the functions of the watch.

On divers watches the bezel is usually calibrated into a period of 60 minutes and can only rotate in one direction. (Unidirectional rotating). This is used to calculate the remaining oxygen level when scuba diving.

The bezel may have other calibrated markings and the ability to rotate in one or two directions depending on the watch.

Other functions typically found on a bezel include tachymetre scale, GMT 2nd time zone function and telemetric scale.

For elegant watches the bezel maybe decorated with a precious metal or stones such as diamonds. Usually a certificate stating the quality, size and weight of the diamonds will be provided with the watches. 

09: What watch band type (bracelet or strap) should I get?

Choosing the band type can be an aesthetic decision but there are practicalities to be considered as well such as comfort and weight.

Aesthetically, a shiny black strap of an exotic animal leather like crocodile or alligator is considered the smartest type of band for a man. Metal bracelets are then usually the second best choice, whilst for ladies it is generally a jewellery-type bracelet with precious metals and/or stones that is considered the most luxurious for a lady.

With regards to practicality; a steel metal bracelet version will weigh more than the equivalent watch with leather or rubber strap (although watches made with titanium bracelets will reduce the additional weight). Additionally some people do not like the sound of metal bracelets as the links will make a noise when as the wrist is moved.

Additionally if you intend to wear your watch underwater often then a metal or rubber strap will be the better choice as leather is a natural material and constant exposure to moisture will reduce the life considerably.

Here is a brief description between the different types of band you can choose from when you buy your watch:

Leather type straps

These are made using a variety of animal leathers (e.g. calf leather, crocodile, alligator) and can be dyed to almost any colour.Leather straps can be styled in the following way:


Hide-faced, padded: This is a thicker strap with a round outer contour and a crocodile-skin pattern. This style is favoured on the more stylish watches or for formal occasions.

Hide-faced, flat: Typically used on slim dress watches.

Plain-style, padded: Less common, often found on "sports" type watches.

Plain-style, flat: This type of strap is plain (no patterns) and slimline. A simple but practical style.

Generally leather straps will be fastened together using a buckle and pin where the size can be adjusted yourself using the holes punched into the leather. Some higher-end models feature an adjustable metal clasp that can be locked down for greater safety.

Generally for watches with leather straps, swimming is not advised, as it will decrease the life of the strap.

Eventually depending on the usage, the leather strap will need to be replaced due to the natural wear and tear as it is a natural material. You can contact the official repair centre for your watch or enquire at your local jewellers/watch repair shop.

Non-leather type straps

These are typically made of a synthetic material such as nylon or silicone rubber. These are typically longer lasting than the leather type straps but care must be taken not to tear the material.

These are highly suited for sports and swimming as they are elastic to flex with the wearers wrist and are generally water-resistant.

For these synthetic non-metal type bands they will come fastened using different types of pin buckles or clasps.

Metal type bracelets

This type of strap is made of a strong metal alloy (usually stainless steel) and it should last the lifetime of the watch.

For solid metal one-piece jewellery-type bracelets the manufacturers will provide different sizes (e.g. regular and petite) for the same model. If that is the case then we provide a printable size guide for these types of models in the product description.

For flexible types with removable links the manufacturer will provide a standard number of links for the majority of the population. Normally this means that you will need some links removing to fit your wrist, this can be done at any jewellers or watch repair shop where they will measure you and take the correct number of links off for a small charge.

In the rare case of needing additional links for larger wrists then please contact us for more information, please be aware this may incur additional charges as these have to specially order them from the manufacturer.

All metal type bracelets will come will a locking clasp to prevent your bracelet accidentally opening whilst being worn.

Two-tone (bi-metal) bracelets

This type of band has a combination of metals (usually stainless steel and gold) as a aesthetic part of the design.

Changing straps to metal bracelets and vice versa

For some watches they will come with a choice of different band types when you browse our site. If that is the case then the watch band type can be interchangeable.

Please enquire with us if you require an additional band type for your watch.

10: What are the differences between the types of crystal available?

This refers to the hard clear covering that goes over the watch face. When buying a watch the price you pay will determine the type of crystal the watch will come with.

They usually come in the following materials in ascending order of cost:

1) Plexiglass: A clear, lightweight type of plastic that is cheaper to produce than sapphire crystal.

2) Ordinary glass: Like they type used for windows,usually referred to in the watch business as "mineral glass".

3) Synthetic sapphire crystal This type of crystal is extremely scratch resistant (9 on the Moh scale) and can only be scratched by another very hard sharp surface. This type of crystal is favoured by high quality Swiss watchmakers.

Some crystals are made of both mineral and sapphire glass. Seiko, for example, makes some watches with crystals made of mineral glass covered with a layer of synthetic sapphire. Seiko calls this composite material "Sapphlex" or "Hardlex".

Profile shape

This refers to the profile of the crystal shape. Generally most crystals are flat-profile but some are "domed" or "curved" which adds a little bit more thickness to the watch.

Anti-reflective coating

Watch crystals can also be treated with an “Anti-reflective” coating on the inside to prevent glare when viewing your watch under bright lights such as sunshine or fluorescent tubes..

Cyclops lens Some watch crystals have what is known as a “Cyclops” lens. Which is a small window or lens in the crystal that is added to magnify the date 2 1/2 times. This is usually only a feature found on the more expensive models.   

11: What does the water resistance of a watch mean?

The term water resistance refers to the watch's ability to withstand water to varying degrees. This is only to be used as an indication as the water resistance is tested in a laboratory in still or static conditions. If you dive into a pool then the pressure may well exceed the depth you are diving into.

Watches with a screw-in or screw-down crown will generally have higher water resistance levels than watches with a push-in crown.

Note: A watch should never be exposed to hot water (e.g shower or worn in a bath) or exposed to sudden temperature changes e.g sunbathing then diving into a pool.

Table guide to water resistance

Water Activity 50m 100m 200m 1000m

Accidental splashes










Swimming, Snorkelling, Water Sports





Scuba Diving





Professional Deep Sea Diving





12: What does a particular watch function do?

When browsing through our website you will notice various terminologies in the descriptions. Here is a list of the common functions found on watches and a brief description of what they mean.


By convention, a watch is said to be a "simple" watch when it just indicates the time (hours, minutes and seconds) using rotating hands that are placed on the centre point of the dial.

A watch is said to be "complicated" when it features functions in addition to the time.

These may include moon phase, chronograph stopwatch, perpetual calendar, etc.

A “complication” is usually reserved for functions if it is provided by mechanical means, so a multifunction digital watch will not be referred to having complications.

Chronograph Stopwatch

A chronograph watch is a sports watch with a stopwatch function. Most have two or three subdials, or mini dials, for measuring minutes and hours.

Generally for a chronograph watch, the main time seconds indicator will be incorporated into one of the smaller sub-dials and the centre seconds hand will indicate the chronograph stopwatch seconds for easy reading. Whilst the chronograph is off, the centre seconds hand will be in static the 12 o’clock position. If you so wish you can have the centre seconds hand running by starting the chronograph function. This completely safe and it will only use a little more power.

When used in conjunction with specialised scales on the watch dial it can perform many different functions, such as determining speed or distance (see tachymetre). Some can time more than one event at a time (see fly back hand and split seconds hand).


A chronometer is not a function so it would be incorrect to refer to a watch having a “chronometer function”. A Chronometer is in fact a type of certification awarded by the C.O.S.C. in Switzerland that indicates that the watch has been tested in various temperatures and positions and exceeded the accuracy required (within +6 seconds / -4 seconds per day). A non-chronometer certified automatic watch can vary up to +/- 30 seconds a day.

Most manufacturers will only test mechanical watches for the chronometer certification as most quartz watches are very accurate anyway. A chronometer watch will be more expensive than a non-chronometer watch due to the higher quality control required and the cost of the testing involved.

There is a type of chronometer certification for quartz watches but very few manufacturers bother with the certification for quartz watches

These watches are provided with a chronometer certificate with a unique number detailing specific test results by the C.O.S.C. This is unrelated to the term “chronograph” which indicates that the watch has a stopwatch function. A watch can be a chronometer chronograph watch at the same time.


The calendar function on a watch can range from only the date showing in a window through to a triple calendar showing the date, day and month. In the case of a digital watch the dial can display the calendar using the LCD or LED elements.

For mechanical watches, dial cut-outs, sub-dials and/or pointer hands may be used to indicate the calendar.

Date calendar

The date calendar is the most common type found on watches as it the most simple to design. This will usually be a cut-out dial at the 3 o’clock position showing the current date of the month (1 to 31). As there are not 31 days in every month due to the Gregorian calendar system you will need to manually adjust the date using the crown every other month.

Day date calendar

This is a less common type of calendar due to the slightly more complicated mechanism required. This calendar will show the current date as well as the current day of the week. The date can be adjusted by rotating the crown in one direction whilst the day can be adjusted by rotating the crown in the opposite directions.

Perpetual calendar

The most complicated calendar for a mechanical watch is a perpetual calendar that shows the day and month but does not require any sort of adjustment for the differences in month lengths. Leap years can also be programmed into the mechanism

Multifunction Digital

These types of watches will combine a digital display with many functions combined on one watch that would be impossible or very expensive on a mechanical watch. Usually chronograph, 12/24-hour display, alarm, countdown timer, etc

Digital LCD / LED Display

The display of time in numbers instead of hands on the dial. The numbers can appear in an LCD (Liquid Crystal Display), which shows a continuous reading or an LED (Light-Emitting Diode), which shows the time at the push of a button.


Instrument for measuring speed or units. In watch making, a timer or chronograph with a graduated dial on which speed can be read off in kilometres per hour or some other unit (see timer).

GMT function / 2nd time zone

An additional dial that can be set to the time in another time zone. It lets the wearer keep track of local time and the time in another country simultaneously. The 2nd time zone will be indicated in 24 hours.


This is a function on a watch that makes a sound or vibrates at a preset time.

End of life indicator (EOL)

Battery End Of Life indicator. This function warns the wearer of impending battery failure in a quartz watch by means of the second hand jumping in two or sometimes four-second intervals.

Helium escape valve

Prior to surfacing from great depths in a pressurised enclosure, such as a diving bell, toxic gases that have been formed in the enclosure are removed and helium is mixed into the air.

The helium molecules are smaller than air and can therefore penetrate the watch. When the pressurised enclosure surfaces and is depressurised the helium rushes out of the watch so quickly that the glass on the watch can pop out as well.

The watch was built to withstand external pressure, not internal pressure. The glass-popping out can be avoided by opening the Helium Escape Valve on the watch during resurfacing, which allows the helium to escape but prevents water from entering the watch.

Moon Phase

An indicator that keeps track of the phases of the moon. A regular rotation of the moon is once around the earth every 29 days, 12 hours and 44 minutes. Once set, the moon phase indicator accurately displays the phase of the moon.