A symbol of uncompromising innovation beneath the waves, the Omega Seamaster PloProf 1200M 224.30.55.21.01.001 captures the spirit of professional diving and the precision legacy of Omega. Originally engineered in the 1970s for saturation divers who demanded reliability under extreme conditions, the PloProf (“Plongeur Professionnel”) remains one of the most iconic tool watches in the world. This modern reinterpretation honors that legend while introducing refined aesthetics, advanced materials, and Omega’s cutting-edge Co-Axial technology.

This pre-owned Omega Seamaster PloProf 1200M boasts a striking 55 x 48 mm stainless steel case paired with Omega’s “Sharkproof” bracelet, a design as formidable as its name. The black bi-directional sapphire bezel with Super-LumiNova markers ensures perfect underwater readability, while the signature orange bezel security pusherreinforces its professional-grade engineering. Its black dial, framed by a sapphire crystal, features luminous hands and markers and a discreet date display between 4 and 5 o’clock — maintaining legibility in any light.

At its heart beats the Omega Co-Axial Calibre 8500, a chronometer-certified automatic movement renowned for precision, stability, and long-term performance. With water resistance up to 1200 metres (4000 feet), a helium escape valve, and a screw-in crown, this watch remains a benchmark of technical achievement and reliability in extreme environments. Yet beyond its functionality, the PloProf 1200M embodies the collector’s appreciation for Omega’s dual mastery of technology and tradition — a watch made to be worn, admired, and passed down.

Presented in excellent condition, with little to no signs of wear, this piece has been inspected and authentication certified, and includes its original box and papers. For the executive, collector, or seasoned enthusiast, the Omega Seamaster PloProf 1200M is more than a professional dive instrument — it’s a statement of mechanical confidence and enduring legacy.