ETA ETA 7750

The legendary Swiss workhorse chronograph movement used extensively by Sinn in their chronograph watches including the 103, 903, U1000 (U-series), and many others before the development of the SZ series. Features the classic 6-9-12 subdial layout with 30-minute counter at 12:00, running seconds at 9:00, and 12-hour counter at 6:00. Day-date window at 3:00. One of the most reliable and widely-used automatic chronograph movements ever made. Sinn typically uses custom rotors with their branding.