Watch Glossary
1104 horological terms explained · 17/19
Durable watch designed for athletic activities with enhanced water resistance and readability.
Specialized tool for removing and installing spring bars that attach watch straps
Seiko's unique technology combining mechanical precision with quartz accuracy using a mainspring.
Specialized steel alloy used in hairsprings and mainsprings for its elasticity and durability
Corrosion-resistant iron alloy containing chromium and nickel, standard watchcase material
High-grade corrosion-resistant steel alloy with superior polishing and durability characteristics.
Durable metal bracelet, corrosion-resistant, polished or brushed finish
Precision punches used with staking tools to form, shape, or set components onto watch movements.
Rigid base platform in staking sets that prevents component deformation during pressing operations.
Central rotating shaft in a staking set that holds and guides various dies during component assembly.
Interchangeable hardened steel die that fits into a staking tool to perform specific component operations.
Marked measuring surface on staking sets indicating height relationships for different die combinations.
Mechanical advantage system on staking sets providing controlled, consistent pressure application force.
Software design allowing smartwatch apps to function independently without tethered smartphone
Watch dial depicting the night sky map with stars and constellations for a specific latitude.
Medical-grade stainless steel with low carbon content, highly corrosion-resistant
Exotic dial style with distinctive crosshair pattern, highly sought vintage collectible.
Installation of new watch stem when cracked or stripped internally
Case design featuring distinct stepped or tiered levels on the sides, creating dimensional appearance.
Dial inlaid with natural stone materials like marble, granite, or slate for unique patterns
Biometric algorithm analyzing heart rate variability to assess psychological tension
Complication using hammers and gongs to audibly announce time or trigger alarms at predetermined intervals.
Smaller dial face within main dial for chronograph or GMT functions
Smaller auxiliary dial displaying seconds, chronograph functions, or date complications.
Smaller dials within the main dial displaying specific functions like chronograph elapsed time or subdued seconds.
Iconic Rolex dive watch with rotating bezel and exceptional water resistance for diving.
NATO strap variant in soft suede material, luxurious casual appearance
Soft napped leather, luxurious feel, requires careful maintenance
Combined technique using radial brushing patterns to create dynamic light-catching dial effects.
Dial with radial brushed finish creating light-reflecting pattern
Radial brushing pattern emanating from center, creating light-reflecting striations.
Radial brushing pattern emanating from center point, creating a sunburst visual effect.
Radial brushing pattern creating rays of light emanating from center
Complication displaying the times of sunrise and sunset for the wearer's location or selected city.
Mechanical display showing the times of sunrise and sunset for a specific geographic location.
Complication displaying precise times of solar rise and set for specific geographic location.
High-performance luminous paint offering exceptional brightness and extended glow time.
Advanced photoluminescent material applied to hands and indices for enhanced nighttime visibility.
Elegant S-shaped bracket used to adjust the hairspring length for fine timekeeping adjustments
Official certification requiring 60% Swiss value added and assembly in Switzerland
Movement minimum 60% Swiss-manufactured content, Sellita SW200/500, ETA movements qualify
Omega's proprietary silicon hairspring providing superior stability and anti-magnetic properties.
Dial scale measuring speed based on distance traveled, primarily used on racing chronographs.
Scale on bezel used to measure speed based on distance traveled.
Graduated scale measuring speed based on distance and time elapsed.
Simple pin-style buckle that fastens through a leather or fabric strap.
Cartier's rectangular dress watch inspired by military tanks, since 1917
Rectangular case design inspired by military tanks, featuring distinctive curved sides and lugs.
Scale calculating distance based on time delay between light and sound
Bezel with telemeter scale measuring distance based on sound and light propagation differences
Scale calculating distance based on sound propagation and light timing.
Mechanism to counteract effects of temperature changes on timekeeping accuracy
Controlled heating and cooling of steel to achieve desired hardness and resilience properties.
Fine-tuning of mechanical tensions in watch movement for optimal performance
Standardized procedures by COSC for evaluating chronometer precision and reliability
Electronic adjustment system maintaining quartz accuracy across temperature variations
Advanced quartz movement with temperature compensation for superior chronometric stability.
Integrated scale displaying ambient temperature, typically placed on the dial edge or subsidiary dial.
Intermediate wheel in gear train that transfers power between barrel and center wheel
Case construction with separate middle, caseback, and crystal components assembled together.