Mechanism: The Calibre 2135 replaced the older Calibre 2035 that had found success inside the Ladies Oyster Perpetual, as well as the ladies and midsize Datejust. When first introduced, 2135, the demonstrated the highest first time pass rate of any movement tested by the Official Swiss Chronometer Testing Institute. At just 20mm in diameter and 5.83mm in height, the 29-jewel calibers still manage to provide a 42-hour power reserve. The automatic, self-winding movements beat at 28,800vph, the standard frequency of all modern Rolexes that provides the characteristic eight ticks a second smooth sweep of the seconds hand, as well as giving an increased shock protection.

There is a hacking capability with this movement.