Seamaster 'Ploprof'

The Omega Seamaster 'Ploprof' was engineered in the late 1960s at the request of professional divers and quickly became a tool of choice for deep-sea exploration. Its distinctive monobloc case and left-side crown guard set it apart visually and functionally, with the original Ref. 166.077 famously tested by COMEX and Cousteau’s teams. Collectors value it for its uncompromising design and authentic connection to the golden era of saturation diving.

Key variants include the vintage 166.077 with the automatic caliber 1002, and the modern reissues like the 1200M (Ref. 224.30.55.21.01.001) powered by the co-axial caliber 8500. Vintage models typically command a premium in original, unpolished condition, especially with correct bezels and mesh bracelets. Modern versions offer greater depth rating (up to 1200 meters) and updated movements, but the original’s tool-watch charisma remains unmatched among purists.

When comparing options, scrutinize the integrity of the case—its size (55mm) and unique construction often mean replaced parts or refinishing, which can impact value. Original dials and hands are highly prized, as service replacements are common. The Ploprof’s cult following ensures strong demand, but prices vary widely based on condition, completeness (box, papers, bracelet), and whether the watch retains its distinctive original features.