Generally speaking, watch classification is usually divided into eight different functional categories, including chronograph, chronometer, perpetual calendar, antimagnetic watches, diving timepieces, waterproof watch, worletimer and calendar watch. In order to get in-depth knowledge, let me describe them one by one in this post.
Chronograph is a professional name. In old English and Latin, it means “time”, in English record tool, it names “graph.” Some ordinary watches continuously indicate the passing time, while chronograph is distinctive, it can keep and record the length of time. Usually, chronograph has 30 minutes or 12 hours timekeeping function. The longest hand of a watch is used as a chronograph hand which always locates at the 12 o’clock position if you don’t press the chronograph pushers.
Chronometer is a high precise watch, which indicates that this watch has been tested by Swiss Official COSC.
3. Perpetual Calendar
Perpetual Calendar is in the meaning of ten thousand years calendar, which is a exaggerated name in British less exaggerated in China. The alleged “forever” implies that you can be instructed to the correct date without adjusting the chain. Perpetual calendar is a complicated watch and can be instructed to date, even in a week. You do not need to adjust a leap year, because it operates automatically.
4. Antimagnetic watches
Due to some metal parts in a watch, antimagnetic watch is invented, which is used to prevent the the watch from causing magnetism. This anitmagnetic method developed by IWC is: adopting soft iron manufacturing to reduce the magnetism of a watch, certainly, also has the dual protection. For more thoroughly, simply switch to the magnetic material to make spare parts.
5. Diving timepieces
Diving watch is a great invention for divers when diving underneath. Ordinary watch can not dive and must meet stringent regulations. In short, diving watch is used to prevent the reverse rotation in the dark sea, and improve the clear readability by the luminous pointers and markers. It bears higher performance, which can be measured.
6. Waterproof watch
Waterproof watch has the cover glass and engagement with gasket. The twisting screws can prevent the penetration of dust and liquid. In general, the daily life of waterproof watch can only reach 30 meters, while swimming watch is 100 meters.
Worletimer is a chronograph to satisfy the requirements of travelling. It is based on the Greenwich Mean Time (GMT), fully showing the worldwide moments. The great majority of chronograph is engraved with the names of large cities and the local time, at the same time, indicates the dual time zone.
8. Calendar watch
Normally, you will see a small window on a watch dial, with digital instructions a month of 31, this function is the calendar, or you can call it – date. There are two kinds of date indicators, one is used mostly digital, another is pointer display. Additionally, you many see some watches with double window, which are week and date indications, called Full calendar. In general the calendar adds the calendar adjusting device because of the length of the month.