Watch Glossary

Patek Philippe's patented hairspring with silicon construction, improving rate stability and temperature compensation.

Seiko's unique technology combining mechanical precision with quartz accuracy using a mainspring.

Seiko proprietary kinetic energy regulation system preventing escapement impulse variations

Software design allowing smartwatch apps to function independently without tethered smartphone

Collector slang for excessive play in the winding stem from worn stem tube; indicates service need.

Mechanical corrector adjusting sunset time display for atmospheric refraction effects

Movement minimum 60% Swiss-manufactured content, Sellita SW200/500, ETA movements qualify

Omega's proprietary silicon hairspring providing superior stability and anti-magnetic properties.

Electronic adjustment system maintaining quartz accuracy across temperature variations

Advanced quartz movement with temperature compensation for superior chronometric stability.

Intermediate wheel in gear train that transfers power between barrel and center wheel

Specialized gear train modeling lunar orbital eccentricity affecting tidal amplitude

Specialized low-torque jeweled bearing supporting tide wheel with minimal drag

Secondary gear wheel modifying tidal amplitude indication based on lunar phase

Mechanical escapement synchronizing tidal maximum-minimum display with lunar transit

Articulated mechanical linkage connecting lunar position wheel to tidal display wheel

Mechanical linkage synchronizing tide indicator wheel with lunar orbital periodicity

Shape of gear teeth affecting smoothness and efficiency of power transmission

Mechanism encasing the balance wheel assembly in rotating cage to counteract gravity effects.

Swiss chronograph movement, column wheel, 42-hour reserve, basis for many luxury chronographs

Maximum angular displacement of verge's balance crossbar during operational cycle.

Adjustment technique compensating for inherent phase lag in verge escapement systems.

Specialized tooth geometry design enabling verge escapement locking and impulse phases.

Vibrational characteristics of balance wheel in early verge escapement systems.

On-device audio processing enabling voice commands without cloud transmission

Software interface allowing third-party developers to design proprietary watch displays

Basic disc of metal before teeth are cut to create functional gear wheel

Gear on the crown shaft that engages the ratchet wheel during manual mainspring winding.

Shaft that connects crown to keyless works for manual winding and time setting functions

Fork-shaped component that actuates setting lever when pulling crown outward

Legendary integrated chronograph, 36,000 bph, 50-hour reserve, haute horlogerie standard

Zenith's frequency-generating component in El Primero movement, oscillating at 36,000 bph for chronograph precision.