Omega Constellation Co-Axial Watch - 38 mm Steel Case - 18K Yellow Gold Bezel - Grey Dial - 123.20.38.21.06.001 -Silvery 27 mm stainless steel and

27 mm stainless steel and red gold case

39mm stainless steel case

bidirectional rotatable bezel with 24-hour engraved black Cerachrom insert

bezel with engraved Roman numerals

sun-brushed blue dial with diamond hour markers and a date window at the 6 o'clock position

Omega Constellation Co-Axial Watch - 38 mm Steel Case - 18K Yellow Gold Bezel - Grey Dial - 123.20.38.21.06.001 -Silvery 27 mm stainless steel and38 mm stainless steel case, transparent back, 18k yellow gold bezel with engraved roman numerals, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, grey dial with a date window at 3 oclock , caliber 8500 self winding movement, approximately 60 hours of power reserve, stainless steel bracelet with 18K yellow gold bars. Water resistant to 10 bar .