Watch Glossary

Second hand stops when crown pulled, enables precise synchronization, common in field watches

Delicate spiral spring attached to the balance wheel that controls its oscillation rate.

Fixed point anchoring one end of hairspring to balance cock or balance wheel

Manual winding required, no automatic rotor, lighter and simpler design, 4R36, 6R35, 240

High-Accuracy Quartz movement achieving annual rates better than ±10 seconds.

Movement with vibration frequency above 28,800 bph for smoother second hand motion.

Wheel rotating once per 12 hours, driven by minute wheel via motion works