Manual winding
86-135
The rectangular 86-135 PEND S IRM Q SE caliber combines a perpetual calendar with a week-number indication. It offers a 31-day power reserve with a rate accuracy of +/- 1 second per day throughout the month.
86-135 PEND S IRM Q SE
Features: Perpetual calendar. Day, month, leap year and day/night indication displayed in apertures. Date indicated by hand. Week number indicated by a mobile frame. Moon phases. Hours and minutes displayed in a subsidiary dial. Large central seconds hand (jumping seconds). Central power reserve indication by hand. Thickness: 28,55mm. Number of parts: 912. Number of jewels: 67. Frequency: 28 800 semi-oscillations per hour (4 Hz).
