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Watch Glossary

1676 horological terms explained · 2/2

Roman NumeralsDial

Classical Roman numeral hour markers for elegant formal appearance

Root Beer GMTHistory

GMT-Master II with brown and black bezel insert, resembling root beer coloring.

Rotating BezelCase

Bezel that rotates in one or both directions for timing purposes.

Rotating Timing BezelBezel

Bidirectional bezel allowing divers to track bottom time and decompression stops.

RotorMovement

Weighted oscillating component in automatic watches that winds the mainspring via wrist motion.

Roulette DateDial

Date wheel with alternating Arabic numerals and dashes creating a segmented appearance

Royal OakModel

Audemars Piguet's iconic octagonal sports watch introduced in 1972

Rubber BraceletBracelet

Sporty bracelet made from synthetic rubber, water-resistant and flexible

Rubber FKMStrap

FKM fluorocarbon rubber strap, chemical-resistant, durable, sporty aesthetic

Rubber Steel HybridBracelet

Bracelet combining rubber inserts with steel links for comfort and durability

Rubber StrapMaterials

Durable elastomer material for watch bracelets, popular in diving and sport watches

Rust PreventionMaintenance

Application of protective coatings and maintenance to prevent oxidation of components

RutheniumPlating

Dark grey precious metal plating offering distinct color and hardness

Ruthenium PlatingTreatments

Dark metallic coating providing contrast and protection to white metal watch components.