The main parts of an analog quartz watch movement are the battery; the oscillator, a piece of quartz that vibrates in reaction to electric present; the integrated circuit, which divides the oscillations into seconds; the stepping motor, which drives the gear train; and the gear train itself, which makes the watch’s hands move. A digital watch motion has the very same timing parts as an analog quartz motion however it has no stepping motor or gear train.
The primary parts of a mechanical watch movement are the winding mechanism; the mainspring, which is the source of the watch’s power; the gear train, which transmits power from the mainspring to the escapement and drives the watch’s minutes and seconds hands; the escapement, which distributes power to the oscillator (i.e., the balance) and controls how quickly the mainspring loosens up; the balance itself, which measures out time by vibrating at a constant rate; and the movement works, which moves the watch’s hour hand.
Many mechanical and quartz analog watch movements are made by one of 3 companies: Resident, Seiko, (both are Japanese firms) or Switzerland’s ETA (pronounced EE-tuh), which is owned by the big Example Group watch conglomerate. There are a number of smaller watch motion companies: Ronda, ISA (pronounced EYE-suh), and others. Modules for digital watches are made by numerous companies, the majority of them in China.