Watch Glossary and Terms with Images

A fine stone is a mineral having the same properties as a precious stone though to a lesser degree. The main fine stones are topaz, spinel, tourmaline, garnet and quartz (rock crystal, agate, amethyst).StopwatchTimekeeping instrument which can be used for measuring intervals of time. When this is done, the time display is partly or wholly lost until the hands are reset.Striking-work, Striking-MechanismIn a watch or clock, automatic or hand-operated mechanism that strikes the hours, etc, or rings an alarm-bell (v. repeater).Super accurateA watch that is accurate to +/- 10 seconds per year.A *** calendar does not automatically take months with less than 31 days into account, or leap years, and must therefore be adjusted five times a year.SkeletonSkeleton watch: watch in which the case and various parts of the movement are of transparent material, enabling the main parts of the watch to be seen.Step motorAn electric motor in which at least one part moves as a series of steps. Also known as a Lavet motor after its inventor Marius Lavet, the step motor equips the majority of quartz watches. StoneIn watch***, a precious stone used as a bearing, endstone or pallet-stone, known internationally as jewels. The majority of stones (jewels) used in watches today are synthetic. Their role is to minimise friction.A precious stone is a hard and rare crystalline mineral, used in jewellery and for certain parts of precision instruments such as watches, clocks, and compasses. The four precious stones are the diamond, ruby, sapphire (both corundums) and emerald (beryl).