Seamaster Automatic Omega, Seamaster, 120 m/400 ft, Automatic,, Ref. ST 166.0250. Made in the early 1970s. Fine and rare, tonneau-shaped, center seconds, self-winding, water-resistant, stainless steel diver’s wristwatch with date, black bezel and a stainless steel Omega mesh bracelet with slip-in clasp.
Case: Three-body, polished and brushed, hooded lugs, bidirectional revolving graduated black bezel for the decompression times, screwed-down case back and crown, winding crown protected by the crown guard.
Dial: Black with painted luminous baton indexes, outer minute/seconds divisions, aperture for the date. Luminous white baton hour and orange arrow minute hand.
Movement: Cal. 1002, copper-colored, 20 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring. Dial, case and movement signed.
Reference: ST 166.0250
Dim. 38 x 42 mm. Thickness 11 mm.
Starting in 1970, Omega began to seriously compete with the new Rolex Sea-Dweller by introducing The Seamaster 600 Ref 166.0077 AKA the "PloProf" a nickname which stands for the first syllables of the French words "Plongeur Professionel".
While Rolex worked we helium escape valves to solve the problem of the crystal popping during decompression due to helium absorption. Omega preferred to manufacture an impenetrable case. The Ploprof was used by the Cousteau Team and many other professional divers. However its daily use was limited due to the size of the case and its thickness. For more recreational use Omega introduced the Reference ST 166.0250. The watch had some of the characteristics of its older brother but was water resistant to 120m or 400ft. This Seamaster gained the nickname of "Baby" PloProf because of its smaller size.
Our watch has kept all its original parts including the bakelite bezel in great condition. The dial shows no water marks and the luminous have a beautiful light beige patina. A beautiful wearable watch fitted on the Omega shark maille bracelet in great condition.