A. Lange & Sohne Style No: 414.028A. Lange & Söhne 1815 Chronograph - 39.5mm White Gold Case - Black Dial - Black Strap
39.5 mm white gold case, 11 mm thick, black solid silver dial, calibre L951.5 manual winding movement with chronograph, approximately 60 hours of power reserve, black strap.