Omega Constellation Co-Axial Watch - 27 mm Steel Case - Diamond-Set Bezel - Mother-Of-Pearl Dial - 123.15.27.20.55.003 unworn Blue dial with an embossed

Blue dial with an embossed lozenge pattern and a date window at 3 o’clock and its engraved roman numerals

calibre 1904-FU MC automatic movement

polished and satin-finished microblasted titanium bezel

Crown:    Screw-down

Glucydur beryllium alloy balance with high-precision adjustment cam on balance arms

Omega Constellation Co-Axial Watch - 27 mm Steel Case - Diamond-Set Bezel - Mother-Of-Pearl Dial - 123.15.27.20.55.003 unworn Blue dial with an embossed27 mm stainless steel case, transparent back, diamond set bezel, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, White mother of pearl dial with a wavy pattern that flows between the iconic claws, 11 diamond indexes, date window at 3 o'clock, caliber 8520 self winding movement with chronometer and automatic winding in both directions to reduce winding time, approximately 50 hours of power reserve, stainless steel