A Japanese quartz movement is a mechanism for keeping time based upon the regular vibration of tiny section of quartz crystal. The "Japanese" part of the name refers to where the mechanism was manufactured, not where the crystal originated from.Continue Reading
All watches and watches need a regularly moving object, called an oscillator, to ensure that the time they are keeping does not become erratic. A familiar example is the swinging pendulum of a grandfather clock. Clockwork-based watches use physical levers, springs and cogs working together to produce regular and precise rotation of the hands around the face of the watch.
Quartz watches do not need the elaborate physical parts of clockwork watches. Their oscillator is not a pendulum or spring, but the quartz crystal itself. The crystal vibrates in response to a small electric charge constantly applied to it. Scientists call the vibration the piezoelectric effect, and the amount of vibration can be very precisely known, allowing for extremely accurate time-keeping.
The vibrations of the crystal send pulses to a circuit which count them and make the hands of the watch turn. Because no mechanical parts are ensuring the watch keeps time, watches with quartz mechanisms do not need to be wound.Learn more about Jewelry & Watches
In order to identify the manufacture date of a Bulova watch, locate the code or symbol on the back of the case or on the movement. Bulova watches used a symbol on watches manufactured between 1924 and 1949 and a two-digit code for watches manufactured from 1950 to 1999.Full Answer >
Serial numbers associated with pocket watches manufactured by the Keystone Watch Case Co. can be located on the movement of the watch and will help to identify its date of production. It is important to note that there is a second serial number located on the watch case that is unrelated to the one inscribed on the movement, and it should not be used to determine the manufacturing date of the pocket watch.Full Answer >
The serial number of a American Waltham Watch Company pocket watch is located on the movement of the watch. It can be found by removing the back case of the watch.Full Answer >
When a push button ignitor is engaged, a hammer within the device forcefully strikes a piece of quartz crystal, producing a spark that falls onto a ground plate within the appliance. When used in conjunction with a combustible material, a flame results.Full Answer >