Rolex cal. 3085
The Rolex cal. 3085 is an in-house developed self-winding (automatic) GMT movement. It was introduced by Rolex in 1983 and was in use till 1989. It has a frequency of 28,800 and a power reserve of 42 hours, COSC certification, 27 jewels, Hacking seconds, Rapid calendar advance and GMT functionality (Dual Time zone) in 24-hours mode.
