OMEGA first introduced the Seamaster 300 in 1957 - it was a watch designed especially for divers and professionals who worked underwater. More than half a century later, the timepiece makes a comeback in a completely upgraded and enhanced form, ready for a new generation of adventurers. This Seamaster 300 has a sand-blasted black dial with rhodium-plated hands coated with \"vintage\" Super-Lumi Nova. The polished ceramic bezel ring has a Liquidmetal™ diving scale. The 41 mm brushed and polished stainless steel case is presented on a matching bracelet. A transparent caseback makes it possible to see the anti-magnetic OMEGA Master Co-Axial calibre 8400 within. Calibre Omega 8400: Self-winding movement with Co-Axial escapement. Resistant to magnetic fields greater than 15, 000 gauss. Free sprung-balance with silicon balance spring, two barrels mounted in series, automatic winding in both directions. Bridges and the oscillating weight are decorated with exclusive Geneva waves in arabesque. FEATURESAnti-Magentic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1. 5 tesla (15, 000 gauss).Automatic Watch: A self-winding watch or automatic watch uses a mechanical movement whose main spring is wound automatically by the natural motion of the wearer\'s arm. Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).Screw-In Crown: Self-locking crown, screwed into the tube of the case, used for highly water resistant divers\' watches. Transparent Case Back: A transparent case back - frequently made of sapphire - makes it possible to see the movement inside the watch. Unidirectional Rotating Bezel: A bezel which turns in only one direction. Particularly useful for divers who cannot accidentally rotate it in the wrong direction, which could cause them to miscalculate their dive times. A rotating bezel makes it easy to measure elapsed time. Between lugs21mm Bracelet Steel Case Steel Case dia