Omega Style No: 329.92.43.51.10.001 Omega Speedmaster Chronoscope Co-Axial Master Chronometer Chronograph - 43 mm Bronze Gold Case - Oxidised Bronze Dial

43 mm bronze gold case, transparent back, polished brown ceramic bezel ring with tachymeter scale in "vintage" enamel, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, oxidised bronze dial featuring a special patina and opaline finish, Calibre 9908 manual-winding chronometer movement with chronograph and small seconds. Water resistant to 50 metres (167 feet).