Omega Speedmaster Moonwatch Omega Co-Axial Chronograph Watch - 44.25 mm Black Ceramic Case - Sedna Gold Bezel - Grey Dial - Black Leather Strap - 311.63.44.51.06.001 '57 Caliber Omega 9300 self winding

Caliber Omega 9300 self winding movement with column wheel mechanism and co-axial escapement

At its core lies the precision-driven Rolex Calibre 3255

transparent back

36mm stainless steel case

Hans Wilsdorf founded Tudor in 1926 to bring impressive standards of dependability and exceptional precision to modern timekeeping

Omega Speedmaster Moonwatch Omega Co-Axial Chronograph Watch - 44.25 mm Black Ceramic Case - Sedna Gold Bezel - Grey Dial - Black Leather Strap - 311.63.44.51.06.001 '57 Caliber Omega 9300 self winding44. 25 mm black ceramic case, transparent back, 18K sedna gold bezel, sapphire crystal with anti reflective treatment on both sides, grey dial, caliber 9300 self winding movement with chronograph function, approximately 60 hours of power reserve, black leather strap with a brushed ceramic foldover clasp. Water resistant to 50 m (167 ft).