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The Encyclopedia of Horology

Calibre database

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Specifications

FieldRolex Calibre 3135
Makerrolex
CountrySwitzerland
Period1988 – c. 2015
DiameterApprox. 28.5 mm
HeightApprox. 6 mm
Jewels31
Frequency28,800 vph (4 Hz)
Power reserveApprox. 48 hours
WindingSelf-winding, Perpetual rotor
SettingTwinlock/Triplock screw-down crown on most applications
EscapementSwiss lever with Rolex's own pallet and escape-wheel production
BalanceGlucydur balance with Breguet overcoil, later Parachrom hairspring on some variants
ComplicationsDate (Cyclops-magnified on many dials), Date
ArchitectureA robust in-house self-winding calibre with a free-sprung, adjustable-mass balance, produced in very large numbers and forming the backbone of Rolex's core professional and dress models for over two decades.