A. Lange & Sohne Richard Lange Watch, limited edition of 100 pieces, round platinum case (41.9mm diameter x 12.1mm thickness) with transparent case back, black hand-stitched crocodile leather strap with a platinum clasp, silver dial with black Roman numerals and silver hands, the hours subdial is at 5 o'clock, sweeping minutes at 12 o'clock, and an exposed tourbillon cage at 7 o'clock with running seconds , Caliber L072.1 manual-winding movement with tourbillon functions, 36 hour power reserve