(calibre 561) lever movement signed and numbered 19656359 , adjusted to five positions and temperature, black dial with a "semi pie pan" sloping edge and baton markers, date aperture, red centre seconds hand, screw back with Constellation emblem, back cover signed inside Omega Watch Co and with case maker`s mark CB for Centrale Boites 33mm wide Case with light surface scratches, dial looks clean, hands with small scratches, later strap and buckle, hand setting correctly, date changing correctly, movement in going order.