But a giant movement model, just to increase the rushing heartbeat of the Swiss Competitors and to give them the opportunity to closely examine what they would have to dealA Lange and Sohne Datograph Perpetual Calendar Chronograph 18K Rose Gold () A Lange & Sohne Datograph Perpetual Calendar chronograph, , 18K rose gold with an 18k rose gold Ttang buckle, manual wind caliber L9521, power reserve 36 hours, perpetual calendar, moonphase at 6 o'clock, 30 minute flyback chronograph, day / night indicator, big date A lange sohne datograph flyback