Omega Seamaster Ploprof 1200M Co-Axial Master Chronometer 55x48mm Titanium Black Dial 227.90.55.21.01.001 - BRAND NEW

The Omega Seamaster Ploprof 1200M is one of the most distinctive and uncompromising professional dive watches ever produced, and reference 227.90.55.21.01.001 represents its most refined expression to date. The Ploprof name is a contraction of the French plongeur professionnel — professional diver — and the watch was originally conceived in the late 1960s and early 1970s as a purpose-built instrument for saturation and commercial deep-sea divers who demanded absolute reliability far beyond what a conventional sports watch could offer. That legacy of extreme capability lives on in every detail of this modern titanium iteration.

The case of reference 227.90.55.21.01.001 measures an imposing 55x48mm and is crafted entirely in grade 5 titanium, a material prized for its exceptional strength-to-weight ratio and outstanding resistance to corrosion in saltwater environments. The asymmetric cushion case shape is immediately recognisable and entirely functional: the crown is protected beneath a spring-loaded pusher guard on the side, preventing accidental adjustment under pressure, while the overall architecture is engineered to withstand the crushing depths of 1,200 metres of water resistance. On the wrist, despite its substantial dimensions, the titanium construction keeps the watch remarkably wearable.

The dial presents a bold, legible black surface populated with luminous index hour markers that ensure instant readability in low-light and underwater conditions. The bi-directional rotating titanium bezel allows divers to track elapsed immersion time with precision, and its smooth, controlled action is calibrated for reliable use even with gloved hands. Every element of the dial and bezel layout prioritises function without sacrificing the sophisticated aesthetic that defines modern Omega design.

Powering this Ploprof 1200M is an Omega Co-Axial Master Chronometer movement, a designation that carries significant technical meaning. The Co-Axial escapement reduces friction and wear for long-term accuracy and reduced servicing intervals, while the Master Chronometer certification confirms that the movement has passed the rigorous testing protocol administered by the Swiss Federal Institute of Metrology, METAS. This includes resistance to magnetic fields of up to 15,000 gauss, multiple positional accuracy tests, and water resistance verification — standards that go well beyond the traditional COSC chronometer certification.

The titanium bracelet is purpose-designed for the Ploprof, offering robust construction, a comfortable fit over a dive suit, and a secure deployment clasp that matches the overall professional character of the watch. Supplied brand new and complete, reference 227.90.55.21.01.001 arrives in full Omega presentation, ready to be worn immediately or added to a serious collection. For the collector or diver who demands the most capable and technically advanced Seamaster Omega produces, the Ploprof 1200M in titanium is without equal.

At Bizak & Co., we specialise in sourcing and presenting new and pre-owned luxury timepieces with full transparency and expertise. Purchasing the Omega Seamaster Ploprof 1200M ref. 227.90.55.21.01.001 from bizakandco.com means buying with confidence: brand-new condition, authentic Omega provenance, and the personalised service of a trusted luxury watch dealer. We invite you to contact our team with any questions or to secure this exceptional professional diver for sale today.