This Omega is 41 mm sedna gold case with anti-magnetic protection, transparent back, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black pie pan dial with a month of the year on each of its facets, Calibre Omega 8923 self-winding co-axial master chronometer movement with date and annual calendar, approximately 55 hours of power reserve, black leather strap. Water resistant to 100 metres (330 feet).