Omega Seamaster Diver 300M Co-Axial Master Chronometer Watch - 42 mm Steel Case - Unidirectional Bezel - Black Ceramic Dial - 210.30.42.20.01.001 Ix The 116500 series was first

The 116500 series was first introduced at the 2016 Baselworld Watch Fair

Water resistant to 30 metres (100 feet)

00ct Center Princess Diamond (Center Stone Not Included)

Calibre Omega 8922 self-winding co-axial master chronometer movement with date and annual calendar

Roman numeral

Omega Seamaster Diver 300M Co-Axial Master Chronometer Watch - 42 mm Steel Case - Unidirectional Bezel - Black Ceramic Dial - 210.30.42.20.01.001 Ix The 116500 series was first42 mm stainless steel case with helium escape valve, transparent back, unidirectional rotating bezel with a white enamel diving scale, domed scratch resistant sapphire crystal anti reflective treatment on both sides, polished black ceramic dial with laser engraved waves and a date window at 6 oclock, Caliber Omega 8800 self winding movement with co axial escapement, chronometer, date, approximately 55 hours of power reserve, stainless steel bracelet.