This Omega Seamaster 300 features a 41mm 9K bronze gold case, brown leather strap, rotating bezel with ceramic insert, front sapphire crystal, and sapphire crystal exhibition case back. Screw-down crown and case back. 300-meter water resistance. Brown sandwich dial with luminous hands and markers. Powered by Omega automatic co-axial master chronometer caliber 8912 with 60-hour power reserve. 21mm lug width.