Omega Style No: 311.50.39.30.01.001 Omega Speedmaster Calibre 321 Chronograph - 38.6 mm Canopus Gold Case - Deep Black Onyx Dial

38.6 mm canopus gold case, transparent back, bezel is filled with black enamel, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, deep black onyx dial with an applied vintage OMEGA logo and typography featuring the oval O (typical for the first CK2915 models), Calibre 321 manual-winding movement with chronograph and small seconds. Water resistant to 60 metres (200 feet).