Watch Glossary
1104 horological terms explained
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Damper SpringMovement
Secondary spring reducing oscillation in balance wheel assembly
Date Wheel ThicknessMovement
Measurement specifying date disc component dimensions
Day-Date ComplicationMovement
Displays day and date, common in NH35 and mid-tier movements, adds mechanical complexity
Deactivation SpringMovement
Component disengaging chronograph mechanism when pusher released
DepthMovement
Engagement depth between escape wheel and pallet fork affecting timekeeping stability
Direct ImpulseMovement
Escapement design delivering impulse directly to the balance wheel, reducing energy loss.
DropMovement
Angular clearance allowing pallet fork to separate from escape wheel teeth
Dual BarrelMovement
Two mainsprings in series, increases power reserve, common in chronograph movements like 9300