Steel Glashutte Original Sport Evolution Reference 39-31-73-73-14. Case diameter 46mm. Water resistant to 100 meters. Automatic caliber 39 movement, 51 jewels. Functions, hour and minute display, small second, chronograph function with second stop, 30-minute and 6-hour display. Black dial with applied hour markers, luminous hands and application at 12, black second sweep sub-dial at 3, black minute and hour time elapsed sub-dials with red outer, white printed graduated minute and 1/5th rehaute, tachymeter black bezel. 40 hours power reserve. Mineral glass see through case back, brushed and polished steel bracelet. Box and papers dated 2009. Our reference S19315.