Watch Glossary
1104 horological terms explained · 14/19
Woven nylon material strap, lightweight, breathable, and military-inspired style
Mechanism that automatically adjusts for months with different numbers of days without manual correction until year 2100.
Rolex's automatic winding mechanism using a free-spinning rotor
Simplified striking complication that chimes hours and quarters but only on demand.
Property of materials that absorb light and re-emit it, used in all non-radioactive watch lume
Sunken dial design resembling pie with raised outer edge, creating dimensional depth effect
Dial design using pillars or columns as hour markers
Aviation-focused watch with large readable dial, often featuring chronograph and specialized functions.
Simple strap buckle with pin through holes, classic and adjustable design
Small gear with fewer teeth, typically fixed to wheel shaft for gear meshing
Thin shaft extending from watch gears that rotates in jeweled bearings to reduce friction.
Precision polishing of watch movement pivot points to reduce friction
Small rounded points on watch components that allow smooth rotation in jeweled bearings
Rotatable star chart on watch dial showing constellations visible from any date and time.
Base structural component of the movement holding bridges, jewels, and gear pivots in place.
Dense, precious metal prized for luxury watches; highly resistant to corrosion and wear
Portable timepiece carried in pocket, popular from 17th century until wristwatch era.
French name for Geneva Seal, Swiss quality and craftsmanship hallmark certification
Professional polishing of watch case and bracelet to remove scratches and restore shine
Mirror-polished outer ring component with high reflective shine
Case finish with a mirror-like reflective surface achieved through grinding and buffing.
High-gloss surface treatment creating mirror-like reflective appearance on watch cases and components.
High-gloss white precious metal finish with brilliant reflectivity
Reflective smooth surface with high gloss achieved through polishing
Smoothing watch surfaces to a high shine using progressively finer abrasive compounds.
Ceramic dial surface offering durability and distinctive matte aesthetic with enamel-like finish
IWC's large precision pocket watch conversion collection from 1939
Fine-tuning of movement rate to account for accuracy differences in various wearing positions.
Timekeeping variation depending on the position or orientation of the watch mechanism
Duration the watch continues running after being fully wound without additional energy input.
Display showing remaining energy stored in the mainspring, indicating when rewinding is necessary.
Second-hand timepiece sold by previous owner; may include warranty or guarantee
Fine-tuning of hairspring length to achieve desired rate.
Iconic three-piece link design with solid center links, classic luxury appearance
Hardened steel plate in case presses that distributes uniform pressure across watch case components.
Testing watch case integrity under controlled water pressure conditions
Manufacturing process verifying watch integrity at rated depth specifications.
Hour markers screen-printed or applied to dial surface in single plane dimension
Year watch was manufactured, determined from serial number or case back markings
Radioactive element formerly used in watch lume, less hazardous than radium but still radioactive
Documented history of watch ownership and service, increases value and authenticity
Bezel with graduated scale for measuring heart rate by counting pulses over time interval
Scale for measuring heart rate by counting pulse beats
Scale used with chronograph to measure heart rate from pulse beats.
Smartwatch operating system architecture managing app alerts and message delivery
Buttons on the case side used to operate chronographs and other functions.
Seals around chronograph pushers to maintain water resistance.
Physical Vapor Deposition; durable coating applied to steel for black or colored finish
Exotic snake leather with distinctive scale pattern, lightweight and supple
French term for perpetual calendar requiring no adjustment until the year 2100.
Electronic movement using vibrating quartz crystal regulated by a battery for timekeeping.
Spring mechanism allowing fast removal and replacement of straps or bracelets.
Mechanism allowing rapid date adjustment without advancing hour hand to set accurately
Chronograph designed for motorsports with tachymeter scale and precise timing capabilities.
Brushing pattern radiating outward from center point like spokes
Vintage luminous materials containing radioactive elements like radium or tritium for continuous glow
Radioactive luminous material used in watch dials pre-1960s, now considered hazardous
Vintage dial with radioactive radium-based lume, highly collectible and dangerous.
Vintage dial style with distinct numerals used for railway timekeeping
Toothed wheel in the winding mechanism that prevents mainspring from unwinding during manual winding.