Omega Speedmaster Mark II Co-Axial Chronograph Watch - 42.4 mm Steel - Sedna Gold Case - Grey Dial - Steel And Sedna Gold Bracelet - 327.20.43.50.01.001 41.0 18K Sedna gold crown and

18K Sedna gold crown and push pieces

Water resistant to 50 meters

unidirectional rotating black ceramic bezel with diving scale filled with Super-LumiNova and numerals in colored lacquer representing the colors of the Olympic rings

41 mm 18K Sedna gold case

39 mm moonshine gold case

Omega Speedmaster Mark II Co-Axial Chronograph Watch - 42.4 mm Steel - Sedna Gold Case - Grey Dial - Steel And Sedna Gold Bracelet - 327.20.43.50.01.001 41.0 18K Sedna gold crown and42. 4 mm x 46. 2 mm steel sedna gold case, 18K sedna gold bezel, sapphire crystal with anti reflective treatment on both sides, grey dial, caliber 3330 self winding movement with chronograph function, approximately 52 hours of power reserve, steel and 18K sedna gold bracelet. Water resistant to 100 m (330 ft).