Watch Glossary

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.

Pattern variation combining tapisserie base with radiating lines from center hour marker.

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.

Gemstone setting that decreases in width from stone to mounting base.

The number of tapisserie grid cells per millimeter of dial surface.

Tolerance specification for horizontal-vertical line intersections in tapisserie patterns.

Consistency of width in tapisserie pattern lines across entire dial.

Perfect 90-degree crossing angle requirement between tapisserie horizontal and vertical lines.

Woven textile-inspired dial finish with interlocking geometric lines creating fabric-like appearance.

Depth variation in woven pattern creating natural light-and-shadow visual effect.

Smaller tapisserie-finished subsidiary dial used in chronograph or calendar complications.

Center reference line maintaining geometric balance of woven pattern across dial face.

The spacing ratio between horizontal and vertical lines in tapisserie dial patterns.

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

Modern technique where gemstone appears suspended between two metal bands.

Standardized procedures by COSC for evaluating chronometer precision and reliability

Vintage dial featuring printed brand or model information; presence affects collector desirability.

Light reflection differential between raised pattern elements and base dial surface.

Conservation technique for refinishing worn pattern details on vintage dial surfaces.

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.

Minute repeater chiming hours, quarter hours, and minutes when respective pushers are activated individually.

Design featuring three principal gemstones, often representing past, present, future.

Displays tidal information based on lunar cycles, useful for maritime and sailing activities.

Dial with distinctive turquoise/Tiffany blue color, iconic Rolex collectible variant.

Tool that analyzes watch beat, amplitude, and rate in real-time.

Maximum allowed variation in seconds per day certified by COSC standards

Fixed outer bezel marking specific time intervals for dive planning.

Automatic time adjustment system utilizing GNSS and network data for accuracy across regions

Electronic device that measures watch rate and performance parameters.

Reference standard component used to verify accuracy and sensitivity of timing machine sensors.

Digital circuit in timing machines measuring escapement frequency in oscillations per hour with precision.

Multiple electromagnetic or optical sensors in timing machines that detect and measure balance wheel vibrations.