Brand: Omega

Model: Seamaster 600 Ploprof Professional

Reference Number: 166.077

Year: Circa 1977

Case Material: Stainless steel

Caliber: Omega 1002, automatic

Strap Material: Rubber

Bracelet/Strap: Original Omega blue Tropic strap

Dimensions: Approximately 55 × 48 mm

Gender: Men's

Dial: Blue

Condition: Excellent

Signed: Case, dial, movement and strap signed Omega

The Omega Seamaster 600 Ploprof ref. 166.077 stands among the most significant professional dive watches ever created. Developed during the 1970s in collaboration with commercial divers and saturation diving specialists, the "Ploprof" (Plongeur Professionnel) was engineered with uncompromising focus on underwater performance and reliability.

This example, dating to approximately 1977, features the highly sought-after Mark III dial with its unmistakable oversized orange minute hand, specifically designed to provide instant dive-time legibility under the most demanding conditions. The massive monobloc stainless steel case, water-resistant to 600 meters, eliminates the traditional case back to maximize structural integrity.

Its famous red bezel-locking button remains one of the most recognizable design elements in vintage watch collecting and perfectly illustrates Omega's engineering-driven philosophy. Inside beats the reliable Omega Caliber 1002 automatic movement, renowned for its robustness and ease of servicing.

A major highlight is the inclusion of the highly desirable original Omega Shark Mesh bracelet, considered by collectors to be the ultimate configuration for the vintage Ploprof, accompanied by its original blue Tropic strap that perfectly complements the unmistakable 1970s tool-watch aesthetic. Preserved in excellent condition and retaining its original character throughout, this Seamaster 600 Ploprof remains one of the purest and most collectible expressions of professional dive watch design.

Case: the case features an asymmetrical design created to protect the left-side crown while maximizing comfort during professional use. Constructed from stainless steel, its monobloc architecture eliminates the conventional case back, increasing resistance against extreme underwater pressure. The iconic red locking button secures the rotating bezel against accidental movement.

Dial: the blue dial features luminous indexes and hands for exceptional underwater visibility. The oversized orange minute hand is the defining feature of the Ploprof, allowing divers to instantly monitor elapsed dive time. Functions include Hours and Date, complemented by a professional minute track.

Movement:the Omega Caliber 1002 is an automatic movement from Omega's renowned 1000-series introduced during the early 1970s. Operating at 28,800 vibrations per hour and featuring a quick-set date mechanism, it is respected for its durability, reliability, and straightforward servicing, making it one of Omega's most successful vintage automatic calibers.