Omega Constellation OMEGA Co-Axial Master Chronometer - 39 mm Steel Case - Tally- Ruthenium-Grey Dial - Blue Leather Strap - 131.13.39.20.06.002 Mark interchangeable full and sapphire crystal

interchangeable full and sapphire crystal back

Movement Automatic Watch Style Sports Watch Bezel

2mm steel case

Caliber Omega 9300 self winding movement with column wheel mechanism and co-axial escapement

10 carats and lacquer panther spots

Omega Constellation OMEGA Co-Axial Master Chronometer - 39 mm Steel Case - Tally- Ruthenium-Grey Dial - Blue Leather Strap - 131.13.39.20.06.002 Mark interchangeable full and sapphire crystal39 mm steel case with anti magnetic protection, transparent back, bezel with blued Roman numerals, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, tally brushed ruthenium grey dial with date at 6 oclock, Calibre Omega 8800 self winding co axial master chronometer movement with date, approximately 55 hours of power reserve, blue leather strap. Water resistant to 50 metres (167 feet).