| The Ingenieur Perpetual Calendar 41 is the first stainless steel model to combine the Gérald Genta-inspired Ingenieur design with the perpetual calendar developed by Kurt Klaus. |
Round
Sapphire crystal
See-through case-back
Stainless steel
41.6 mm
100 m
13.3 mm
Blue
60 h
Automatic winding
82600
Perpetual calendar with displays for the date, day, month, leap year and perpetual moon phase
Stainless steel
Fold-Over Clasp