Watch Glossary

1045 terms · 22 shown

Octagonal caseCase

Eight-sided case shape providing a geometric, distinctive appearance with flat edges and corners.

OilingMaintenance

Application of specialized lubricating oils to watch movement friction points

Omega Caliber 321Movement

Historic movement used in Speedmaster Professional, column wheel chronograph, hand-wound

Omega Caliber 9300Movement

In-house movement, dual barrels, 60-hour reserve, integrated chronograph mechanism

Omega Co-Axial 8900Movement

Master Chronometer certified, antimagnetic, 60-hour power reserve, chronograph capability

One-piece strapStrap

Single continuous strap under entire watch case, minimalist construction

One-watch collectionCollecting

Strategy of owning a single versatile watch to meet all wearing needs

Opaline DialTreatments

Semi-transparent opalescent dial finish creating soft, milky color-shifting light reflection effects.

Opaline FinishDial

Soft, milky dial finish with subtle sheen and minimal reflectivity.

Original BezelCollecting and Market

Factory-original rotating bezel insert, replacements are common on vintage sports watches

Original DialCollecting and Market

Factory-original dial versus replacement, significantly impacts authenticity and value

Original HandsCollecting and Market

Factory-original hour and minute hands, replacements diminish collectibility and value

Original StrapCollecting and Market

Factory-original bracelet or strap accompanying the watch, adds substantial value to vintage pieces

Oscillating PinionComplications

Pivoting pinion in chronograph that engages and disengages the motion work smoothly.

OscillatorMovement

The balance wheel and hairspring assembly that regulates the watch's timekeeping rate.

Ostrich LeatherStrap

Exotic ostrich skin with distinctive quill marks, luxurious and durable

Ostrich strapStrap

Exotic leather with bumpy quill texture, rare and luxurious appearance

OverbankingPrecision

Excessive amplitude causing balance wheel to swing past optimal range.

OvercoilHistory

Additional outer coil on hairspring that improves isochronism and temperature stability

Oyster BraceletBracelet

Three-piece solid links forming a robust, professional bracelet design.

Oyster caseCase Design

Rolex's pioneering waterproof watch case design introduced in 1926

OystersteelMaterials

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