Watch Glossary
1356 horological terms explained · 2/2
Watches combining traditional timekeeping with electronic dive computer functions.
Water-resistant timepiece rated for underwater use, featuring rotating bezel and luminous markers.
Expandable bracelet segment or strap allowing watch to fit over wet suit.
Specialized dive watch meeting ISO standards for underwater use and decompression safety.
Rotating bezel with timing marks for underwater use, typically unidirectional for safety during dives.
Extending bracelet or strap designed to fit over wetsuits or thick clothing
Diamond-Like Carbon coating providing extreme hardness and scratch resistance
Specific dial variant with dot marker above 90-degree position; rare configuration.
Two gasket seals on crown and case back for improved water resistance.
Two superimposed chronograph hands allowing simultaneous timing of multiple independent events.
Two independent tourbillons rotating in opposite directions for improved chronometric performance.
Elegant timepiece designed for formal occasions, typically thin with minimalist dial and leather strap.
Lugs with holes for direct strap attachment, found on vintage military watches.
Watch with crown positioned at 3 o'clock, designed to be worn on the right wrist for left-handed operation.
Angular clearance allowing pallet fork to separate from escape wheel teeth
Two mainsprings in series, increases power reserve, common in chronograph movements like 9300
Displays two different time zones simultaneously, typically with a 24-hour hand tracking second zone.
Hybrid watch design housing analog movement beneath integrated digital sensor layer