Omega Speedmaster Mark 4.5 wristwatch. Ref.: 176.0015 Year: 1975 (based on serial number). Automatic movement. Calibre 1045, made by Omega. Oversize case measuring 40 mm excluding crown. Day/date at 3 o'clock (quick change) Black bezel inside the crystal. Original Omega crown. Push buttons. Lugs integrated in the case. Mineral crystal. Screw-down case back with the Seamaster symbol (hippocampus). Black dial with beautiful luminescent markers. Original bracelet, the style with Omega platelets, length 20 cm including case. GMT function at 12 o'clock. Seconds of the current time at 9 o'clock. Chrono minutes in the centre. Chrono hours at 6 o'clock. Tachymeter scale. Omega logo at 12 o'clock. Serial 319xxxxx (1975) Keeps time very well. Watch and chronograph in perfect working order. No box or papers. Tracked shipping via courier.