Oris 674

Oris chronograph movement based on ETA/Valjoux 7750 with custom red rotor and Etachron regulator. Features central hours, minutes, chronograph seconds, small running seconds at 9 o'clock, 30-minute counter at 12 o'clock, 12-hour counter at 6 o'clock, and date at 3 o'clock. Earlier models used 21,600 vph while newer versions use 28,800 vph. Largely replaced by Sellita-based Calibre 774 after ETA supply restrictions.