Watch Glossary

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

Case's ability to withstand water exposure, measured in meters or ATM.

ISO standard measurement of watch's ability to resist water penetration at depth

Verification of watch waterproof rating using specialized pressure testing equipment

Undulating linear pattern creating flowing wave-like appearance

Extended crown or controls designed to operate over thick diving suit gloves.

Additional strap segment for wearing watch over thicker diving suit materials

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

Pure ceramic material used for watch cases and components, offering extreme scratch and heat resistance.

Neutral luminous material that glows white or pale, used in some contemporary watch designs

Early Submariner with disproportionately wide case, reference 5508 and 5510.

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

Natural wood veneer dial providing warm organic appearance with natural grain variations

Displays 24 or more time zones simultaneously, often with city names on the dial or bezel.

Complex watch displaying multiple time zones, typically showing 24 hours and several cities.

Textile strap from various fabrics, breathable and comfortable casual wear

Super-LumiNova formulation known for bright green glow and reliable luminescence performance

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

Japanese technique creating perfect mirror finish without visible scratches

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

Annual calendar display indicating astrological zodiac signs rather than traditional month names.

Dial complication showing the current zodiacal sign based on the calendar date.

Rotating dial or hand showing current zodiacal position based on calendar date.