Watch Glossary
1104 horological terms explained
Citizen's light-powered technology using any light source to charge the watch indefinitely.
Small pinion on escape wheel shaft that meshes with lever or pallet fork
Toothed wheel that delivers impulses to the balance wheel via pallet fork
Number of escape wheel teeth engaged per hour; defines movement speed and accuracy rating.
Mechanism that releases energy from the mainspring in precise, regulated pulses.
Energy transfer ratio from mainspring to oscillator, improved in Co-Axial and Chronergy
Toothed wheel in the escapement mechanism that interacts with the lever to release energy.
Ubiquitous workhorse movement, 38-hour reserve, automatic, reliable and affordable
Legendary chronograph movement, column wheel, 42-hour reserve, widely used by luxury brands