Sinn has long used the Valjoux 7750 movement for their chronograph watches, but began reworking the movement in the 2003. Wanting a replacement for their Lemania 5100 "stop minutes" chronograph, they reworked the chronograph counters entirely. Rather than using a subdial, the chronograph minutes are displayed with a central hand, along with chronograph seconds and running hour and minutes. A 12-hour chronograph subdial at 6:00 completes the timing feature. Complementing the small seconds at 9:00 is a 24 hour subdial at 3:00. The date window is placed at 4:30.