This is A. Lange & Sohne Datograph Perpetual in platinum. The watch's 41mm case features an exquisite round bezel made of platinum. Its strap is made from black crocodile leather and has a platinum tang buckle. The watch's hours, minutes, seconds, perpetual calendar, flyback chronograph, moonphase display and tachymeter functions are displayed on a silver dial and powered by the watch's Calibre L952.1 manual winding movement with ~36 hours power reserve. The movement's intriguing vibrations can be viewed via the watch's transparent sapphire crystal case back.
