Rolex cal. 3135

Rolex cal. 3135 is one their most popular in-house developed self-winding (automatic) movements used in many of their models such as the Submariner Date, the Datejust, the Sea-Dweller, the Deepsea and the Yacht Master. It was introduced by Rolex in 1988 and was in use at least till 2009. It has a frequency of 28,800 beats per hour (A/h) and a power reserve of 48 hours, COSC certification, 31 jewels, Hacking seconds and a date display at 3 o’clock with Rolex cal. 3136 is an in-house developed self-winding (automatic) movements used in their Datejut II models. It was introduced by Rolex in 2007 and was in use till 2017. It features their proprietary Parachrom Bleu Hairspring and the Paraflex balance shock protection, a frequency of 28,800 beats per hour (A/h) and a power reserve of 48 hours, COSC certification, 31 jewels, Hacking seconds and a date display at 3 o’clock with Quick Date Correction.