The Seamaster chronograph in the OMEGA Olympic Timeless Collection combines white Arabic numerals and red chronograph counter hands on a black dial protected by a scratch-resistant sapphire crystal. Its distinctive Olympic look is underscored by the rhodium-plated Olympic Rings as the counterweight of the chronograph seconds hand. Its divers’ watch status is underscored by the robust case, the unidirectional rotating stainless-steel bezel, patented OMEGA helium escape valve and water resistance to 300 meters / 1000 feet guaranteed by a screw-in crown with O-ring gasket and decompression ring, screw-in pushers and a screw-in case back. The sporty look of this chronograph, which is enhanced by a tough, water-resistant rubber strap, belies the high-end technology inside. The Seamaster Chronograph of the OMEGA Olympic Timeless Collection uses the exclusive OMEGA calibre 3303 movement. This self-winding OMEGA chronograph movement is a certified chronometer and uses a column-wheel chronograph mechanism – the sign of a truly superior chronograph.