OMEGA Speedmaster professional Mark III Men's chronograph wristwatch in steel, round case. Black dial with two counters, luminescent baton hour markers and tachymeter scale. Date window at 3 o'clock. Automatic movement. Engraved notched back (unopened). Steel bracelet with articulated links, folding clasp, signed and numbered 1153/138. Wrist circumference: 18 cm. - Case diameter: 52 x 41 mm. Significant scratches and wear.