The Rolex caliber 3135 is an Certified Chronometer automatic movement with 31 jewels, and is adjusted for five positions and temperature. This movement was announced in 1988.
The 3135 has approximately 48 hour power reserve, however, some specs listings online have been known to incorrectly round this number up to 50 hours.
The 3135 is found in several Rolex watches including the Submariner, Sea-Dweller, DSSD, Yacht-Master, new Sub C (116610), etc.
Note: Despite incorrect information on many sites, the Datejust II does not have a 3135 inside. DJII is powered by a larger version of the 3135 known as the caliber 3136,
Please share your experience with the Rolex caliber 3135 in the comments below…