OMEGA Seamaster Diver 300M

Omega Seamaster Diver 300M 210.30.44.51.03.001 is a 44 mm steel chronograph with a blue dial. The case is 17.2 mm thick with a lug-to-lug span of 52.8 mm, and a unidirectional rotating bezel frames the sapphire crystal, treated against reflection on both sides. The self-winding calibre 9900 drives it, a column-wheel chronograph with a Co-Axial escapement and Master Chronometer certification from METAS, resistant to magnetic fields up to 15,000 gauss. Two barrels in series give 60 hours of power reserve, along with a time zone function. Small seconds and date sit on the dial, and a sapphire display back is fitted. The screw-down crown pairs with a helium valve. Fitted to a steel bracelet with a foldover clasp and diver extension, the case is rated to 300 metres.