The internationally patented Gérald Genta mechanical movement with jumping-hour and retrograde-minute functions has now been supplemented with a date indicator : a hand turning in a 1500 area, divided from I1 to 31, at 6 o’clock. At the end of each month, it automatically returns from 31 to .1. A rapid correction can be made at any time by using the crown. The system has a patent pending. Available in large and intermediate sizes.