Vacheron Constantin : Chronograph with or without perpetual calendar
Overseas Chronograph
Movement : mechanical self-winding, Calibre 1137, 40h power reserve Case : steel Diameter : 42mm Functions : hours, minutes, seconds, column-wheel chronograph, large date, 12h and 30mn counters Case-back : solid, engraved Water resistance : 150m Bracelet : steel
Overseas Chronograph Perpetual Calendar
Movement : mechanical self-winding, Calibre 1136 QP, 40h power reserve Case : pink gold Diameter : 42mm Functions : hours, minutes, seconds, column-wheel chronograph, 12h and 30mn counters, perpetual calendar (day of the week, date, 48-month counter, moon phase) Case-back : solid, engraqved Water resistance : 150m Bracelet : dark brown Mississipiensis alligator leather