Movement record · Switzerland
Rolex Calibre 3135
Partially verifiedA 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.
Technical specifications
- Diameter
- Approx. 28.5 mm
- Height
- Approx. 6 mm
- Jewels
- 31
- Frequency
- 28,800 vph (4 Hz)
- Power reserve
- Approx. 48 hours
- Winding
- Self-winding, Perpetual rotor
- Setting
- Twinlock/Triplock screw-down crown on most applications
- Escapement
- Swiss lever with Rolex's own pallet and escape-wheel production
- Balance
- Glucydur balance with Breguet overcoil, later Parachrom hairspring on some variants
- Complications
- Date (Cyclops-magnified on many dials)
Identification features
- Free-sprung balance with poising weights on the rim rather than a conventional index regulator on later examples
Known variants
- Numerous internal revisions across its production life; later replaced by newer in-house calibre families
Servicing notes
Serviced almost exclusively through Rolex's own service network or specialists with equivalent parts access.
General guidance only. Antique movements should be serviced by a qualified watchmaker.
Historical significance
One of the most numerous and studied in-house automatic calibres in modern Swiss watchmaking.
Photographs
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Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.
Sources & references
- Rolex service literature as summarised in independent technical guides
- Specific internal revision dates vary between secondary sources
Where sources disagree, the disagreement is stated rather than resolved silently.