Acrylic Glass
The cheapest glass is actually a plastic. Acrylic plastic is tough, flexible and transparent. It is not likely to shatter as it is very light. The downside is that it may scratch easily. The scratches can be removed, it is advisable to consult a jeweller about the best way to proceed. Childrens’ watches often have an acrylic glass as they are unlikely to be able to break it even if they are not as careful as they could be!

Mineral Glass
The most common form of glass is mineral glass. This is made by using heat or chemicals to treat ordinary glass in order to make it more scratch resistant. If the glass does become too scratched it will need to be replaced.  Unfortunately this also has the affect of making the glass more likely to shatter. Occasionally when a watch glass shatters small shards of glass can lodge themselves into the workings. If this happens then the cost of repair is likely to exceed the value of the watch. Most watches, however, do not end their life in this way; so there is no need to be unduly worried. But it is worth being careful if your watch glass does shatter in order to prevent this from happening.

Sapphire Crystal
The most desirable watch glasses are made out of either synthetic or genuine sapphire. Commonly synthetic sapphire is used. This is made out of crystalised aluminum oxide, it has the same physical properties as the natural gem frequently used in jewellery but without the colouring. It is the most expensive way to create a watch glass but the advantage is that the glass is incredibly durable. Sapphire rates 9 on the Moh scale, (that is the scale that measures the relative hardness of all materials) and is just behind diamond which measures 10. Of all the glasses it is the least likely to shatter or be scratched. If anything you should be more concerned that your watch may scratch another surface! Sapphire crystal is one of the features that pushes up the price of high end watches. This is due to the value of sapphire and partly because expensive tools that use diamonds to cut and shape the sapphire have to be used to make them. Premier brands such as Seiko and Citizen watches often use sapphire glass for their watches.

• часы storm

Mechanical Watches

The first wristwatches were mechanical. They are powered by the energy stored in a spring which is used to move a number of weighted wheels, or gears as they are also known, that turned the hands. This technology came from spring-powered clocks that were around as early as the 1400’s; it began to be used for smaller watches in the 1600’s. These types of watches need to wound regularly; meaning that as well as being prone to losing time they rely on their user to remember to wind them. For these reasons mechanical watches are generally collectors items or created primarily for nostalgic purposes rather than for practicality.

Kinetic or Automatic Watches

The modern variation of the mechanical watch that has recently seen a revival is the kinetic watch also known as an automatic watch. These watches have a similar internal structure as the mechanical watches but rely on the movement of the wearer to power the spring. They are often less reliable than other forms of power for watches; there is a greater likelihood that they will lose time, in some cases a few seconds every day. They have made a comeback in certain designers ranges such as Police and Seiko. This is partly because they never need to have a battery change and also the mechanics allow for some additional stylistic features like transparent backs through which the mechanism can be viewed.

Quartz Watches

In 1969 the first quartz powered watch was available on the market. Quartz has special properties so when it is shaped in a certain way and subject to an electrical field it will bend. When the field is removed the quartz generates an electrical field of its own as it moves back to its original shape. This property is known as piezoelectricity. Due to this property quartz crystals can be used to regulate the movement of an electronic oscillator. This energy and movement powers, controls and regulates the hands of the watch. This revolutionary technology is now the most common form of power in wristwatches. It is also the most reliable timekeeping method which also comes at a low price.

Atomic Timekeeping

The most accurate time pieces on the planet are connected to atomic clocks. An atomic clock deviates by around a second every million years! Certain wristwatches such as the Casio WaveCeptor range utilise this technology. This is done through a network of radio transmitters which emit time signals. Radio controlled watches receive this signal and adjust themselves accordingly.

Types of Watch Batteries

There are three main types of battery that are used to power watches. The most common is the silver oxide battery. They are frequently used in watches because they have a high energy to weight ratio. This means that they should last for a long period of time. Due to the silver content they can be expensive to produce which is why they are not often used for products that take larger batteries.

Lithium batteries are long-life and also relatively expensive. They are used primarily in watches that have lights or other energy draining features.

Solar cells are now becoming a popular and effective way of powering wristwatches. High-tech battery cells are fuelled by the light that reaches them through the watch face. This means that the user will never have to change the battery. Citizen\’s Eco-Drive range has set the standard for the practical application of this technology. As an additional ecological bonus the batteries do not contain any of the harmful chemicals found in regular batteries.

• types of time keeping

Gold Watches

Gold is only used for luxury watches. There are two main reasons for this; firstly that gold is an expensive material, secondly that it is an extremely soft metal. Gold watches are dress watches, normally purchased for special occasions and are not suitable for everyday wear. One advantage to having a gold watch is that gold has an intrinsic value. If the watch can no longer be worn the gold still has a value according to its weight and the price of gold on any given day.

Gold Plated Watches

If you fancy a gold watch but want something more usable than a solid gold watch you can opt for a watch with a leather strap and gold case or a gold plated watch. Gold plated watches have the same lustrous colour as gold but come at a fraction of the price. New technology in this field means that instead of layering the gold on top of a base metal it is now infused into it (by a process known as Physical Vapour Deposition or P.V.D.). This results in a more even spread of colour and longer lasting cover.

Silver Watches

Silver is also a luxury item that retains its value. It is not as expensive or as soft as gold but is still a malleable substance which is why it is used so frequently in jewellery. Silver watches are more durable than gold watches but are more prone to tarnishing. Although this can be rectified by regular cleaning and taking good care of your watch.

Titanium Watches

Titanium is a lightweight and exceptionally durable material. It has the highest strength to weight ratio of any metal. Anything that is worn on the wrist is likely to take a lot of damage over it’s life, so titanium is an ideal material to make a watch out of.. The downside is that it is an expensive material compared to stainless steel, so the cost is often considered prohibitive by watch makers.

Stainless Steel Watches

Stainless Steel is the most common of all metals used in the construction of watches. It is strong, resistant to most forms of corrosion and does not easily stain. This combined with its distinctive bright colouring make it an ideal metal to use in watch making. It is commonly used for watch cases whatever the strap type and is a relatively cheap option.

Rubber/Resin Watches

Watches with resin straps are normally designed for serious outdoor use. They are really tough and have the advantage of being both lightweight and water resistant, protecting the delicate workings of the watch. Often childrens watches will have a strap made from resin for much the same reasons!

Leather Strap Watches

Leather is used to make watch straps because it is inexpensive, compared to the other products. It also allows for customisation. Leather can be dyed any colour. Due to the predominant use of buckles as a fastening, leather straps can be made one length and easily adjusted to fit a number of different sized wrists. The downside is that they are nowhere near as long lasting as metal straps and they can get stained fairly easily. Leather straps have the advantage of being made from a soft natural fabric, so most people find that they are comfortable to wear. Imitation leather is also available, these straps tend to be cheaper and less durable. Some people may find that they are allergic to them.

Webbing Strap Watches

Webbing straps are generally the cheapest of the straps on the market. They are commonly made from nylon. They are fairly durable and normally water resistant. They are often used for watches that are designed specifically for outdoor pursuits or for childrens watches.

• watch bracelet
• Watch Strap
• watch straps
• watch bracelets
• stainless steel watch bands
• Stainles steel bracelet for watch
• metal watch strap
• watch bracelet types
• watches bracelets
• types of watch straps