|housing diameter:||51 mm|
|housing height:||18 mm|
The most robust watch crystals are made out of sapphire glass. Only diamonds and carbide is harder and can scratch sapphire glass. Of course there are other materials such as some metals and stones which will scratch your sapphire glass crystal, so it is not wise to expect the watch to handle any abuse without getting marked. Sapphire has one downside though, it is highly reflective. Some watches receive an anti-glare coating to compensate for this, but sadly this coating is less hard and will scratch more easily.glass
Digital watches and clocks have a digital display. That is what makes them digital watches and clocks. Whether they record time in a digital or analogue fashion is irrelevant. A digital display will not point out the current time on a display of all times possible, as it does in an analogue watch, but it will only show the digits of one time. Nowadays this usually happens via LED or LCD display, but that has not always been the case. Digital watches have been around long before the electronic display was invented. They used turning disks or cylinders behind a mask that would only show one digit at a time. Or airport-style flip-card mechanics were used.
Different from titan watches, which are just timepieces for very large people out of the Greek mythology, titanium watches are made from titanium. This is a very hard metal, making the watches very durable and scratch resistant. Plus this metal is surprisingly light, so titanium watches will not dislocate your shoulder every time you swing your arm. It is these to qualities that make titanium popular with space technology engineers, racing car makers and other high-end gadgetry. In addition to being just a very suitable material for making watches out of, it is also the case material of choice for people with a nickel allergy who have too much style for plastic watches. Titanium watches definitely do not contain nickel.
Titanium is also darker than stainless steel. It looks greyer and is less shiny than the silvery gleam of stainless steel watches.
Water tightness or impermeability, surprisingly enough, is the degree to which you can expose your watch to the element water. A watch can be water repellent to a variety of degrees, from surviving the odd splash, to keeping the watch fully functioning long after your crushed body has hit the ocean floor. Please note that these are always theoretical values. Water behaves very differently at different temperatures and with varying salinity. So we took our crayons and made you this rough guide (which, by the way, is in no way legally binding and we will not be held accountable for your watch if you ruin it)::
FYI: 10m is 1 bar is (roughly) 33 ft is (exactly) 0.986923267 atm