Omega Seamaster Professional 600 'Ploprof'
Record status
Individual type · partial
Period
1970s
Maker / issuer
OmegaThe Omega Seamaster Professional 600, known as the 'Ploprof' (Plongeur Professionnel), is a stainless steel dive watch developed for deep-sea exploration and commercial diving projects, including those for COMEX.
Introduced as a prototype at the 1969 Basel Fair and released for public sale in April 1971, the model features a large 55mm asymmetrical steel case designed for high-pressure environments. The watch is equipped with a bidirectional rotating bezel, secured by a distinctive red locking push-button at the top of the case, and a protected crown system. It features a matte blue 'Mk V' dial with tritium-based luminous markers and a date display.
The movement is an automatic caliber with a date complication. The auction description notes the case retains its factory geometry and the watch has been serviced.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Dial
- Matte blue Mk V
- Type
- Diver's watch
- Bezel
- Mk II
- Maker
- Omega
- Bracelet
- Omega 1162 with 162 end links
- Reference
- 166.077
- Case Diameter
- 55mm
- Place recorded
- Switzerland
- Maker / attribution
- Omega
- Date of Introduction
- April 1971
Design
- Visible features
- • Asymmetrical stainless steel case measuring 55mm • Red push-button on the case top for bezel locking • Matte blue dial with tritium markers • Omega 1162 steel bracelet with 162 end links
- Case and Dial Design
- The Seamaster Professional 600 is characterized by its significant 55mm asymmetrical stainless steel case. This construction was specifically engineered for demanding underwater pressure environments associated with late 1960s offshore oil rig development and deep-sea exploration. The case design incorporates a specialized crown protection system to ensure water resistance and operational security. The timepiece features a matte blue dial, identified in the source as the 'Mk V' variant. It displays tritium luminous hour markers, which exhibit a soft green tone. The original metallic date wheel remains in place within the aperture at the three o'clock position. The crystal is composed of mineral glass.
- History and Servicing
- Omega developed the Seamaster 600 in response to the specific requirements of professional diving entities such as COMEX. It was first presented as a prototype at the 1969 Basel Fair before becoming commercially available in April 1971. The object is sold without original packaging or accompanying historical documentation. According to the auction description, the watch has recently undergone a full service to ensure accurate timekeeping.
- Bezel and Functionality
- The watch utilizes a bidirectional rotating bezel designed for professional diving applications, referred to as the 'Mk II' bezel. To prevent accidental adjustment while submerged, the mechanism is held in place by a prominent red push-button locking mechanism located at the top of the case. The watch is mounted on an Omega 1162 stainless steel bracelet equipped with 162 end links. The auction description reports that the case maintains its original factory lines and geometric profile, notwithstanding natural signs of wear from previous use.
Identification
- Reference
- 166.077
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: The exact state of the internal movement components is not detailed
- Research required: The degree of tritium aging and dial consistency is based on source reports