Rolex cal. 2035
The Rolex cal. 2035 is an in-house developed self-winding (automatic) movement used in earlier versions of the Rolex Datejust (ladies and midsize versions). It was introduced by Rolex in 1970 and has a frequency of 28,800 and a power reserve of 48 hours. The cal. 2035 movement has hacking functionality and COSC certification, as well as Glucydur balance wheel and a flat hairspring, as well as central seconds and a date functionality. It has 28 jewels and a frequency of 28,800 beats per hour (A/h).