Watch Glossary
1356 horological terms explained · 1/2
Thin protective coating providing glossy finish and enhanced durability.
High-gloss protective coating applied to dial surface creating deep, reflective finish
Parallel link design resembling a ladder, lightweight and comfortable fit
Precision grinding process using abrasive compounds to achieve exact dimensional tolerances.
Precision welding technique using lasers for delicate watch case and component repairs
Chronograph clutch mechanism engaging laterally to connect or disconnect the seconds wheel.
Measurement of geometric accuracy and flatness of a watchmaking lathe's supporting bed structure.
Replaceable gripping element in watch lathe chucks that holds components during turning operations.
Support bearing assembly on watchmaking lathes preventing component deflection during precision turning.
Graduated reference wheel on watchmaking lathes for precise pitch control during screw cutting operations.
Leather strap with traditional buckle closure, classic formal appearance
Leather variant of NATO strap, combines durability with refined appearance
Natural or synthetic material used for classic dress watch bracelets
Hybrid strap with rubber exterior and leather backing, combines durability and style
Crown positioned at 9 o'clock instead of standard 3 o'clock for left-handed watch operation.
Chronograph movement, hand-wound, 50-hour reserve, Swiss precision for military watches
Component in the escapement mechanism that controls the release of energy to the balance.
Type of escapement using pallet fork and lever to regulate energy release to balance
Degree of engagement between escapement and balance wheel at impulse.
Watch produced in restricted quantities, often numbered and highly sought by collectors.
The height variation of surface undulation in linen-pattern guillochage.
Accuracy of interwoven cross-hatch pattern formation in linen guillochage.
Standard spacing distance between linen weave lines, typically 1.5mm increments.
Modern guillochage method mimicking natural linen textile surface appearance.
Fine linear pattern resembling fabric linen texture
The repeating cycle length of linen weave pattern unit cells.
Diagonal cross-hatching pattern imitating linen fabric weave structure on dial surface.
Pattern intersection points where horizontal and vertical linen lines cross on dial.
The directional orientation of linen weave pattern relative to dial center.
Individual connected segment forming a bracelet, connected by pins or rivets.
Specialized tool for removing pins or springs to adjust bracelet length
Amorphous metal alloy used for watch bezels and components, offering extreme hardness and durability.
Exotic reptile skin strap, lightweight with unique textured appearance
Non-linear mathematical scale for multiplication and division calculations
Oversized Mercedes hour hand resembling lollipop, found on military Submariner models.
British competition offering substantial reward for solving maritime longitude determination problem
Challenge of determining a ship's east-west position at sea, solved through precise timekeeping
Number of seconds per day a watch runs behind correct time.
Cellular radio allowing standalone calling, texting, and data without paired smartphone
Adding appropriate lubricants to watch components for smooth mechanical operation
Protruding attachment points on the watch case where bracelets or straps connect.
Terminology describing discomfort when lugs press against wrist bone or surrounding tissue.
Technical review evaluation of lug shape, angle, and curvature affecting comfort.
Negative review terminology for cases where lugs extend beyond wrist bone structure.
Technical specification detailing the arc radius of case lugs affecting wrist fit.
Review language assessing how securely spring bars hold bracelet end links to case.
Review assessment of how smoothly lugs transition from case middle to end links.
Polishing and erosion visible on case lugs from bracelet friction over time.
Space between the lugs where the strap or bracelet attaches.
Measurement between watch case attachment points determining wrist fit compatibility
Rating system evaluating how well a watch's end-to-end length suits average wrist dimensions.
Measurement between the inner edges of the lugs, determining strap and bracelet fit on the wrist.
Review assessment of gap between case lugs and wrist, indicating proper fit.
Mathematical calculation of lug extension distance relative to wrist circumference.
Projections on the case that hold the strap or bracelet.
Abbreviation for luminous material applied to hands and markers.
Radioactive or photoluminescent coating on hands and indices for night visibility
Process of applying luminous material to watch dials, hands, and hour markers
Initial intensity of luminescence immediately after light exposure before degradation occurs
Luminous fill color; typically green, blue, or white for underwater visibility.