Omega, Speedmaster Professional, ref. 105 012-65, steel chronograph wristwatch, circa 1968
Movement: cal. 321, automatic, 17 jewels, n°24013530
Box: diam. 39mm
Complications: chronograph with 2 counters with seconds in the center, graduation for the tachymeter on the bezel, subsidiary counter for the seconds
Signature: dial, movement, case, bracelet
Accessory: box
