Watch Glossary

Review analysis of case body width relative to lug-to-lug measurement.

Manufacturing code engraved on watch case back, sometimes differs from serial number

Measurement of engraved case number digit distances to identify dial/case mismatches.

Tool designed to safely open and close watch cases without damage

Collector practice of restoring brushed finish to over-polished vintage cases during restoration.

Numerical assessment determining if a vintage case has been re-polished vs. original finish.

Precision measurement tool verifying case press alignment accuracy before high-pressure operations.

Manufacturing specification ensuring uniform pressure distribution across case back seating area

Pressurized fluid system in case presses that generates controlled force for crystal and case back sealing.

Measurement standard for case press fluid loss rate indicating maintenance requirement timing.

Electronic force sensor in modern case presses providing digital readout of applied pressure values.

Calibration protocol ensuring case press load measurement accuracy across full force range

Precision tool insert preventing concentrated force damage when pressing watch cases or bezels.

Polishing procedure maintaining case press work surface smoothness to prevent case finish marks.

Specification for case press platen smoothness preventing dial and movement marring

Thermal sensor detecting excessive platen heating indicating potential hydraulic fluid degradation.

Calibrated manometer on case presses indicating applied force in tons or kilograms during assembly.

Adjustment procedure setting maximum pressure thresholds to prevent case material deformation.

Mathematical relationship translating applied pressure readings to equivalent casing-back torque

Subjective ranking of how boldly a watch's thickness projects from wrist surface.

Visual definition of case outline when viewed from side; measure of edge distinctness

Vintage watchmaking technique of hand-stamping serial numbers and hallmarks directly into case metal.

Specialized grading system analyzing case surface consistency, tool marks, and patina for authenticity.

Polishing or brushing watch case to restore original appearance and remove damage

Application of sealant compounds to ensure water resistance and dust protection

How gradual or dramatic the narrowing from case middle to lug influences visual mass

Metal fatigue condition where case lugs gradually deform outward from repeated bracelet stress.

Height of the watch case from caseback to crystal.

Analysis of how case depth influences perceived presence independent of actual mass

Visible signs of use on watch case including scratches, dents, and polishing marks

Cover plate on the back of the case, removable or fixed.

Custom text or designs etched onto the back cover of the case.

Forensic evaluation of inscription cut-depth, tool marks, and letter spacing for period authenticity verification.

Measurement determining if original rubber gasket requires replacement for water resistance.

Specialized artisan or manufacturer producing watch cases from precious metals

Tool used to safely open and close screw-down case backs without damage

Dial representation showing positions of stars, constellations, and celestial bodies.

Main wheel rotating once per hour, drives minute wheel and hour wheel via cannon pinion

Rolex ceramic bezel insert technology offering scratch and fade resistance with color permanence.

Ceramic-based protective coating used on watch components for enhanced durability and corrosion resistance

Ceramic insert bezel technology providing superior scratch and fade resistance.

Hard, scratch-resistant material used for bezels, case inserts, and dial elements

Highly scratch-resistant bezel insert made from advanced ceramic materials for durability.

Watch bracelet made from ceramic, hypoallergenic, scratch-resistant, lightweight

High-tech ceramic material used for watch cases, providing scratch resistance and thermal stability.

Durable scratch-resistant material inlaid in rotating bezel

Watches pushed to extreme depths beyond normal certification limits.

Precisely beveled watch attachment points for refined appearance

Cutting beveled edges on components to eliminate sharp corners and improve aesthetics.

Decoration technique where designs are engraved and filled with enamel or contrasting materials.

Enameling technique where design areas are recessed into metal then filled with colored enamel.

Separate ring containing hour markers applied to dial surface

Duration of light exposure required for photoluminescent materials to achieve maximum brightness

Metal surface finishing technique creating texture for non-reflective gem settings.

Precisely engineered cavity in watch case receiving gem-set mounting cup.

Creating repetitive diamond or square grid pattern on watch surfaces for tactile texture.

Rolex's proprietary luminous material providing blue glow and superior visibility in darkness.

Hard chrome coating process providing extreme hardness and mirror-like reflective finish.

Rolex's escapement system improving efficiency and precision in watches

Rolex innovation, improved efficiency over standard escapement, reduces friction and wear