Watch Glossary

Lightweight metal alloy used in sport watch cases and bezel inserts

Quartz-based stone with sparkling inclusions used for decorative watch dials and bezels.

Luminous material applied to rotating watch bezel markers or indexes

High-performance Super-LumiNova variant offering exceptional brightness and glow duration

Other high-performance Super-LumiNova variants offering comparable or superior luminescent properties

Bulk metallic glass technology used by some manufacturers for ultra-hard, scratch-resistant watch cases.

Metal strap made of integrated links, typically stainless steel, gold, or titanium

Copper-tin alloy developing patina over time; used for vintage-style watch cases

Early luminous compound containing radium, historically used before safer alternatives were developed

Vintage radium-based luminous material formerly used on watches, now obsolete due to radioactivity

Lightweight composite material used in modern sports and racing watch cases

TAG Heuer's proprietary carbon composite material for lightweight, durable watch cases and components.

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

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

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

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

Rate at which case materials expand with temperature changes

Protective coating preventing oxidation of metal components

Glass-like coating applied to watch dials for durability and aesthetic finish

Diamond-Like Carbon coating providing extreme hardness and scratch resistance

Luminous compound that has lost glow intensity; common in 1960s-1980s watches.

Lightweight carbon fiber composite material creating unique weave patterns in watch cases and dials.

Bezel with insert bonded to aluminum ring using specialized adhesive process.

GTLS technology using tritium gas in sealed tubes to provide continuous watch dial illumination

Thin layer of gold plating applied to brass or other base metals

Thin gold plating layer applied to brass watch components; characteristic of mid-century movements.

Precious metal used in watch cases; yellow, white, and rose gold are common varieties

Abbreviation for gaseous tritium light source, a self-illuminating watch dial technology

Luminous material applied to watch hands enabling visibility in darkness

Acrylic plastic crystal material used in vintage watches; lightweight and prone to scratching

Rolex's specialized 5N rose gold alloy offering superior hardness and color retention properties.

Natural or synthetic material used for classic dress watch bracelets

Amorphous metal alloy used for watch bezels and components, offering extreme hardness and durability.

Radioactive or photoluminescent coating on hands and indices for night visibility

Process of applying luminous material to watch dials, hands, and hour markers

Quality of luminous material to adhere properly to dial surface without peeling or degrading

Percentage and area of watch dial, hands, and indices coated with luminous material

Process of filling dial cutouts with luminous material for enhanced visibility and aesthetics

Resistance of luminous coatings to fading, degradation, and environmental exposure over time

Amount of luminous material applied to watch components affecting brightness and durability

Seiko's luminous coating providing bright glow and long-lasting luminescence on watch dials

Omega's proprietary gold alloy designed to resist scratches and maintain its luster indefinitely.

Luminous coating on hour markers and indices for improved nighttime readability

Natural meteorite material sliced and polished to create unique watch dial patterns

Contemporary luminous material specifications balancing safety, brightness, and longevity

Iridescent nacre from mollusk shells used decoratively on watch dials

Iridescent substance from oyster and abalone shells used on premium watch dials

Nylon fabric strap with metal hardware, durable alternative to traditional bracelets

Modern luminous compounds like Super-LumiNova that glow without radioactive elements

Omega's proprietary gold alloy containing platinum, offering increased durability and unique rose-gold coloration.

Rolex's proprietary stainless steel alloy, corrosion-resistant and highly durable for professional watches.

Silvery precious metal used in white gold alloys and luxury watch cases

Property of materials that absorb light and re-emit it, used in all non-radioactive watch lume

Dense, precious metal prized for luxury watches; highly resistant to corrosion and wear

Radioactive element formerly used in watch lume, less hazardous than radium but still radioactive

Physical Vapor Deposition; durable coating applied to steel for black or colored finish

Vintage luminous materials containing radioactive elements like radium or tritium for continuous glow