Omega Speedmaster Mark II Co-Axial Chronograph Watch - 42.4 mm Barrel-Shaped Polished And Brushed Steel Case - Grey Dial - Steel Bracelet - 327.10.43.50.06.001 Tourbillon caliber 2500 self-winding movement with

caliber 2500 self-winding movement with chronometer and co-axial escapement movement

5 mm thick

calibre 35111 self-winding movement with date display

18 ct 5n gold and stainless steel bracelet

scratch-resistant sapphire crystal with anti-reflective treatment on both sides

Omega Speedmaster Mark II Co-Axial Chronograph Watch - 42.4 mm Barrel-Shaped Polished And Brushed Steel Case - Grey Dial - Steel Bracelet - 327.10.43.50.06.001 Tourbillon caliber 2500 self-winding movement with42. 4 mm x 46. 2 mm barrel shaped polished and brushed stainless steel case, caseback engraved with the Seahorse medallion, flat scratch resistant sapphire crystal with anti reflective treatment both sides, grey dial with fluorescent orange central chronograph seconds hand and a matching minute track, self winding chronometer Omega 3330 movement with chronograph, small seconds, and date, approximately 52 hours of power reserve, stainless steel