Officine Panerai OP III

The OP III is based on the ETA Valjoux 7750 chronograph movement with the chronograph functions stripped out. Used in Luminor Submersible, Luminor Marina 40mm, and other automatic models. The modified 7750 retains the robust automatic winding system and date function while simplifying the movement for time-only applications. One of Panerai's workhorse movements in the early 2000s.