Omega - Ploprof

A very rare "vintage cult" wristwatch for professional deep sea divers with centre seconds and date - first series Ref. ST 166.077, Cal. 1002, Dimensions 54 x 45 mm, circa 1970, Origin Schweiz, Accessories Case: Steel, monocoque case, screw-down crown with patented locking nut, bi-directional rotating black bezel locked/unlocked by depressing a red button in the band, solid steel "Omega" bracelet, bracelet length 135 mm, total length 180 mm. Dial: Black. Movm.: Automatic. The "PLOPROF" stands for "PLOngeur PROFessional", which means professional diver. As professional divers began to dive deeper and deeper in the sea, Omega started developing a watch specially designed to withstand very high pressure. At a depth of 250 m, a pressure of 25 kg/cm² is applied to the watch so that the divers could not go deeper than 300 m or risk water getting into the case. After several years of research, the Seamaster 600m Professional - the so-called "Ploprof" - was created. This watch's ultra-resistancy and its exceptional water-tightness lived up to even the high standards of professional divers. The watch was fitted with automatic calibre 1002 and the "Ploprof" was launched in 1970. The first series was marked "600" on the dial, while the second series was marked "600m/2000ft". Lit.: "Omega" by Marco Richon, Bienne 2007, page 330. Case: very good, slightly worn. Dial: very good, hands later original. Movm.: very good, capable of running, cleaning recommended.