OMEGA Speedmaster Professional Moonwatch ref. 3570.50.00 men's chronograph wristwatch. Box and papers. Stainless steel. Mechanical manually wound movement cal. 1861 with good working order (+ sec./d, 300° amplitude). Black tritium dial with baton indices, three subsidiary dials, central stop second and tachymetre scale on the bezel. Stainless steel bracelet with folding clasp, suitable for a wrist circumference of approx. 18 cm. Good condition, slight signs of wear on the bracelet and case, glass with slight scratches. Box, warranty certificate, operating instructions and two replacement links enclosed. Diameter approx. 42 mm measured without crown.