Grey platinum/alligator leather pre-owned Lange 31 45mm from A. Lange & Söhne featuring round face, automatic movement, alligator leather strap, pin-buckle fastening, index hands, chronograph counter and date indication. Original box, papers and WatchBox certificate.. This item comes with a standard two-year warranty from WatchBox.. This watch has been evaluated and authenticated by a WatchBox in-house Swiss-trained watchmaker..