Cal. 3175 is an automatic movement with a central 24 hour hand produced by Rolex. It was used in the GMT-Master, Ref. 16700, from 1988 through 1999. It replaced Cal. 3075 and was replaced by Cal. 3187.
- 1988-1999 Rolex GMT-Master, Ref. 16700
This was the last GMT-Master movement to have a fixed GMT hand rather than the adjustable hand found in the GMT-Master II.