Watch Glossary

Bridge component that supports upper balance wheel pivot and hairspring stud

Oscillating wheel that regulates timekeeping by vibrating at a constant frequency.

Fixed pins limiting pallet fork swing to prevent excessive escape wheel engagement

Cylindrical drum containing the mainspring; core component of the movement's power system.

Circuit analyzing lithium-ion degradation to predict remaining battery lifespan

Number of oscillations the balance wheel completes per hour; common rates include 28,800 bph.

Standard measurement of balance wheel oscillations; higher rates generally indicate better precision.

Oscillation frequency specification, 7750 at 28,800 bph, El Primero at 36,000 bph

Power-efficient wireless connectivity standard for hybrid watch synchronization

Metal component spanning the plate providing additional support and bearing points for pivots.