CALIBRE 3085

Introduction and Launch: The Rolex calibre 3085 is a self-winding movement used in the GMT-Master II and Explorer II, notable for being the first to feature an independently adjustable GMT hand. Measuring 6.3mm thick, its introduction to the GMT-Master II earned the watch the nickname "Fat Lady." Despite its innovation, the calibre 3085 had a relatively short production run from 1983 to 1989.

Technical Specifications

Jewels:
27 Jewels
Power Reserve:
Power reserve of approx 42 hours
Beat Rate:
Operating at 28,800 vibrations per hour (4Hz)
Movement:
Self-Winding mechanical movement
Escapement:
Calibre 3085 features a traditional Swiss lever escapement. It consists of a balance wheel, hairspring, pallet fork, and escape wheel. This mechanism not only regulates the energy release from the mainspring but also maintains the balance assembly at a consistent and precise rate
Anti-Shock:
Kif Anti-Shock System
Hairspring:
Breguet Hairspring
Certification:
Calibre 3085 is certified by the Official Swiss Chronometer Testing Institute (COSC) for precision and accuracy

Design and Features

Hands Configuration:
Hours, minutes, seconds, 24 hour hand and date window at 3 o'clock

Watches with this Calibre

Rolex Explorer II:
16550
Rolex GMT-Master II:
16760
Back to List