Omega Constellation Co-Axial Watch - 27 mm Steel Case - Blue Dial - 123.15.27.20.53.001 annual-calendar and blue leather strap with

and blue leather strap with 18K white gold deployable fliplock clasp

black supernova dial with diamond hour markers

96mm thick

exterior rail-track

Omega Constellation Co-Axial Watch - 27 mm Steel Case - Blue Dial - 123.15.27.20.53.001 annual-calendar and blue leather strap with27 mm stainless steel case, transparent back, domed scratch resistant sapphire crystal anti reflective treatment on both sides, blue lacquered dial decorated with a feathered pattern, Caliber Omega 8520 self winding movement with co axial escapement, chronometer, date, approximately 50 hours of power reserve, stainless steel bracelet. Water resistant to 10 bar (100 metres 330 feet).