Omega Automatic, 50's-60's

OMEGA Automatic watch ref. 2865, Nº 286X X. Decade 1950s - 1960s.
Gold-plated steel case with classic design of rounded lines and fine lugs. Silver dial with applied indexes and gold-tone dauphine hands. Second hand at 6 o'clock. Plexiglass crystal. Omega automatic movement caliber 471, with 19 jewels and bi-directional winding rotor, one of the first automatic movements with this technology from Omega. Pressed case back, with engraved references inside. The strap is broken and the buckle is missing. It works. With Omega case (possibly not the original of the watch).
Measurements: 32 mm (case diameter); 40 x 34 mm (total case with crown).