Omega Speedmaster Co-Axial Chronograph Watch 3126.96.36.199.01.002 Unworn. Automatic self-winding chronograph movement with column wheel mechanism and Co-Axial Escapement. Silicon balance-spring on free sprung-balance, 2 barrels mounted in series, automatic winding in both directions to reduce winding time. Rhodium plated finish with exclusive Geneva waves in arabesque. Brushed/Satin finished stainless steel case 42.25 mm in diameter. Polished finished beveled edges. Exhibition case back. Omega logo on a crown. Black bezel with tachymeter scale. Scratch resistant sapphire crystal with anti-reflective treatment on both sides. Black dial with recessed black sub-dials. Luminous hands and raised index hour markers. Two sub-dials - 60 second and 12 hours. Date window at the 6 o'clock aperture. Minute markers around outer rim. Stainless steel bracelet with brushed outer links and polished center links and edges. Fold over clasp.