Omega Seamaster Planet Ocean 600 M Co-Axial Master Chronometer GMT Watch - 43.5 mm Steel Case - Bi-Directional Bezel - Black Ceramic Dial - 215.30.44.22.01.001 engagement-ring bezel is in 18K red

bezel is in 18K red gold

opaline silver dial with Pie Pan design

Chromalight hour markers

caliber 9901 self-winding Co-Axial master chronometer movement with chronograph and date functions

Omega Seamaster Planet Ocean 600 M Co-Axial Master Chronometer GMT Watch - 43.5 mm Steel Case - Bi-Directional Bezel - Black Ceramic Dial - 215.30.44.22.01.001 engagement-ring bezel is in 18K red43. 5 mm stainless steel case with helium escape valve, transparent back, screw in crown, bi directional rotating bezel with polished bi ceramic black and white insert, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, black ceramic dial with Arabic numerals, caliber 8906 Self winding chronometer movement with Co Axial escapement and GMT time zone function, approximately 60 hours of power reserve, stainless steel