Rolex cal. 3035
The Rolex cal. 3035 is an in-house developed self-winding (automatic) movement. It was introduced by Rolex in 1977 and was used in their Submariner, Datejust, Sea-Dweller and Oyster Perpetual lineups till 2001. It has a frequency of 28,800 and a power reserve of 48 hours, COSC certification and 27 jewels.