Omega
Seamaster 600 Ploprof Mark I - PloProf Diver Mark I Matt Dial

Omega vintage Seamaster 600m Ploprof Mark 1 matte dial 1162, a professional diver’s watch from 1969, used by Commander Jean-Yves Cousteau during experiments off the coast of Marseille, as well as by COMEX. This watch was declared “more watertight than a submarine” after analysis by the American diving research center Ocean Systems Inc. in Tarrytown, NY. In September 1970, it set a diving record at -253 m with COMEX divers during the JANUS and JANUS II exploration missions conducted for ELF to map the seabed off the coast of Ajaccio, in southern Corsica.

Automatic movement Omega caliber 1002 with 20 jewels, features include stop-seconds, date display with quick-set function, and a power reserve of 42 hours when fully wound. Operating frequency is 28,800 vibrations per hour.

Diver watch Seamaster 600 Ploprof 166.077, Omega’s professional diver watch, first edition “Matte Dial”… the rarest in the series, capable of withstanding hydrostatic pressures of 60 ATM and the impact of a 500g weight falling from 25 cm. This automatic date watch was designed to be fully sealed. Unlike the Rolex Sea-Dweller Comex which uses a helium release valve that allows gas into the case, Omega opted for a construction that ensures the watch remains accurate by preventing helium from entering, as helium can negatively affect the balance spring and thus disrupt precision.

The design of this watch is centered around an ultra-resistant monobloc case, a reinforced mineral crystal treated for abrasion resistance and anti-reflection, pressed onto a gasket with 120kg of force and secured by a screwed retaining ring. The square crown is embedded at 9 o’clock (on the left side) to facilitate wrist movement and prevent any accidental manipulation.

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