Introduced in 2009, the Omega Seamaster Ploprof collection descends from the iconic Seamaster Professional 600 and takes its name from the French term for "professional diver" (Plongeur Professionnel) with water-Resistance for up to 1,200 meters, or 4,000 feet. Ploprof watches are powered by a co-axial calibre 8500 movement, have an automatic helium escape valve and feature a bi-directional rotating bezel. Moreover, the models all have a date display window and a large 55mm x 48mm case. With its strong heritage, attractive design and built-in resilience, your Seamaster Ploprof is a highly valuable timepiece that is sought out by collectors everywhere.