9,3 / 10
The present watch is in excellent overall condition.
It has been produced in 1979, which seems to be the very last year of production for this model, and makes it particularly interesting.
About the model
Omega’s PloProf a name derived from the French for professional diver “Plongeur Professionnel” was released in 1971, following four years of research and development including consulting with COMEX and Jacques Cousteau.
Where other brands sought to release the Helium from the case, Omega wanted to develop a watch that would keep the Helium from entering the case in the first place.
The PloProf was a monobloc case in stainless steel with a locking system to secure the square-shaped setting and winding crown and intricate gasket system of interlocking parts that the crystal rested on.
The bi-directional bezel could only be moved through the red release button to the right side of the case, which prevented accidental movement of the bezel.