Omega Constellation Co-Axial Watch - 35 mm Steel Case - Yellow Gold Bezel - Silver Dial - Yellow Gold Bracelet - 123.20.35.20.02.006 Selfwinding interchangeable full and sapphire crystal

interchangeable full and sapphire crystal back

beaded steel crown set with a cabochon-shaped synthetic spinel

small seconds at 9 o'clock and central chronograph seconds and minute hands

hand-stitched large square scale blue alligator strap

Omega Constellation Co-Axial Watch - 35 mm Steel Case - Yellow Gold Bezel - Silver Dial - Yellow Gold Bracelet - 123.20.35.20.02.006 Selfwinding interchangeable full and sapphire crystal35 mm stainless steel case, transparent back, 18K yellow gold bezel with engraved roman numerals, domed scratch resistant sapphire crystal with anti reflective treatment inside, Silver dial with an embossed lozenge pattern and a date window at 3 oclock, caliber 2500 self winding movement with chronometer and co axial escapement movement, approximately 48 hours of power reserve, 18K yellow gold bracelet. Water resistant to 10 bar.