Watch:
Caliber 315 S IRM QA LU
Mechanical self-winding movement
Annual Calendar
Day and month by hands, date in an aperture
Moon phases
Power reserve indicator
Center sweep second hand
Fold-over clasp
Sapphire crystal case back
Water resistant to 30 m
Case diameter: 39 mm
Slate gray or cream dial, gold applied hour markers and numerals
White gold
Caliber:
Annual Calendar mechanism
Day and month by hands, date in an aperture
Moon phases
Power reserve indicator
Center sweep second hand
Annual date correction on March 1
Overall diameter: 30 mm
Height: 5.22 mm
36 jewels, 10 bridges
Balance: Gyromax
Vibrations per hour: 21'600
Power reserve: 48 h max
Number of parts: 355
Patent CH 685585