The Evolution of the Omega Seamaster Ploprof Series

by Barbara Wilson

The Omega Seamaster Ploprof series has carved its name in the history of dive watches, exemplifying Omega’s dedication to precision, durability, and innovation. From its inception to the latest models, the Ploprof series has undergone a remarkable evolution, redefining the standards of professional dive timepieces. In this journey through horological history, we explore the evolution, technology, standout models, comparisons, and maintenance of the Omega Seamaster Ploprof series.


I. The Evolution of the Omega Seamaster Ploprof Series

The Omega Seamaster Ploprof (short for “Plongeur Professionnel” or “professional diver”) series made its debut in 1970, setting new benchmarks in underwater timekeeping. The original Ploprof, with its unconventional asymmetrical case design, boasted an impressive water resistance of 600 meters. Its signature feature was the patented monobloc bezel-release system, which ensured that the bezel could only be rotated in one direction for safety during dives.


1. 1970: Original Ploprof 600M:

The original Ploprof made its debut in 1970. It featured a distinctive asymmetrical case design with a crown positioned at 9 o’clock for enhanced comfort and to prevent accidental crown manipulation during dives.


The watch boasted an impressive water resistance of 600 meters, making it a reliable choice for professional divers.


The monobloc bezel-release system allowed divers to securely operate the bezel during underwater activities.

The bright orange minute hand and large luminescent hour markers ensured legibility in low-light conditions.

2. 2009: Reintroduction of the Seamaster Ploprof:

In 2009, Omega reimagined the Ploprof with modern advancements while preserving its core design and features.

The new Ploprof featured the iconic orange push-button to unlock and rotate the bezel, paying homage to the original model.

It maintained a water resistance of 1200 meters and incorporated a helium escape valve, making it suitable for saturation diving.

3. Modern Innovations: Seamaster Ploprof 1200M:

The modern Ploprof boasts an even greater water resistance of 1200 meters, demonstrating Omega’s commitment to pushing the boundaries of underwater timekeeping.

The bezel-locking system has been enhanced for improved security, and the orange push-button remains a signature feature.

The watch now includes a date function, catering to the practical needs of wearers.

The case and bracelet feature improved materials and manufacturing techniques, enhancing durability and comfort.

4. Continuing Legacy: Seamaster Ploprof 600M:

The latest iteration of the Ploprof, the Seamaster Ploprof 600M, maintains the iconic design elements and incorporates modern technology.

With a water resistance of 600 meters, it caters to professional divers and enthusiasts alike.

The watch embraces Omega’s Master Chronometer certification, ensuring precision and anti-magnetic properties.

Over the years, the Ploprof series underwent various modifications and improvements, maintaining its essence while embracing contemporary advancements. The latest models, such as the Omega Seamaster Ploprof 600M, continue to honor the lineage by incorporating cutting-edge technology while staying true to the iconic design cues that made the series legendary.

II. The Technology Behind Omega Seamaster Ploprof 600M

The Omega Seamaster Ploprof 600M is a testament to Omega’s commitment to producing high-performance dive watches. This timepiece is not just about aesthetics; it’s a technologically advanced instrument designed to withstand the rigors of deep-sea exploration. The helium escape valve, a critical feature for saturation diving, ensures that any trapped helium can safely escape during decompression.

1. Helium Escape Valve (HEV):

The helium escape valve is a crucial feature for saturation divers who spend extended periods in pressurized environments. During decompression, helium molecules that have penetrated the watch can cause pressure buildup. The HEV allows these gases to safely escape, preventing damage to the watch.

2. Robust Materials:

The use of high-quality materials enhances the watch’s durability. The Ploprof 600M incorporates materials like stainless steel, titanium, and ceramic to ensure resistance to corrosion, scratches, and wear.

3. Co-Axial Escapement:

Omega’s proprietary Co-Axial escapement reduces friction in the movement, improving accuracy and longevity. This technology contributes to the watch’s reliability even in challenging environments.

4. Master Chronometer Certification:

The Master Chronometer certification signifies that the watch has undergone rigorous testing by METAS (Swiss Federal Institute of Metrology) to ensure exceptional accuracy, anti-magnetic properties, and overall performance. This certification attests to the Ploprof’s ability to withstand magnetic fields and maintain precise timekeeping.

5. Water Resistance:

The Ploprof 600M is water-resistant to an impressive depth of 600 meters (2,000 feet). This level of water resistance is achieved through meticulous case construction, gaskets, and seals.

6. Locking Mechanisms:

The bezel-locking system ensures that the bezel remains securely in place during dives. The orange push-button, a signature of the Ploprof, allows the wearer to release and rotate the bezel as needed.

7. Luminescence:

The watch’s luminescent markers and hands guarantee visibility in low-light conditions, a crucial feature for professional divers.

8. Comfort and Fit:

The ergonomic design of the Ploprof’s case and bracelet ensures a comfortable fit, even over a wetsuit. The push-button extension system allows easy adjustments for optimal wearing comfort.

The use of high-quality materials, such as titanium and ceramic, contributes to the watch’s durability and resistance to corrosion. The Co-Axial escapement and Master Chronometer certification guarantee the accuracy and reliability of the movement even under extreme conditions. The Ploprof 600M is a fusion of cutting-edge engineering and design that meets the demands of professional divers and enthusiasts alike.

III. The Top 5 Omega Seamaster Ploprof 600M Watches of All Time

Delving into the realm of personal preferences, let’s explore the top five Omega Seamaster Ploprof 600M watches that have left an indelible mark. From iconic classics to contemporary gems, these watches have earned their place based on their design, features, and popularity.

1. Omega Seamaster Ploprof 600M Co-Axial Master Chronometer 42 mm:

This model strikes a balance between modern aesthetics and the vintage charm of the Ploprof legacy.
The 42 mm case size caters to those who appreciate a more restrained and versatile option.
It incorporates Omega’s latest Co-Axial Master Chronometer movement, ensuring precision and performance.

2. Omega Seamaster Ploprof 600M Co-Axial Master Chronometer 55 mm:

This oversized masterpiece pays homage to the original while embracing contemporary proportions.
Its bold presence on the wrist makes a powerful statement and captures attention.
The 55 mm case size evokes the spirit of the original Ploprof from 1970.

3. Omega Seamaster Ploprof 600M Co-Axial Master Chronometer “Sedna Gold”:

The combination of rose gold (Sedna Gold) with the Ploprof’s robust design creates a unique and luxurious look.
This watch brings together the worlds of elegance and functionality, making it a versatile choice for various occasions.

4. Omega Seamaster Ploprof 600M Co-Axial Master Chronometer “Blue Dial”:

The blue dial version offers a contemporary twist on the classic Ploprof design.
The blue hue evokes the depths of the ocean and adds a touch of modernity to the watch’s appearance.
It blends a timeless design with a fresh and vibrant color.

5. Omega Seamaster Ploprof 600M Co-Axial Master Chronometer “Titanium”:

The titanium variant combines lightweight comfort with the watch’s robust and durable construction.
Titanium’s corrosion resistance and strength enhance the watch’s suitability for demanding conditions.
It provides a modern take on the Ploprof’s functionality while prioritizing wearability.

IV. Omega Seamaster Ploprof 600M vs. Omega Seamaster Ploprof 1200M Watches

Comparing the Omega Seamaster Ploprof 600M with its successor, the Omega Seamaster Ploprof 1200M, reveals a fascinating juxtaposition of features and design cues. The Ploprof 600M retains its classic proportions and aesthetic cues, while the Ploprof 1200M pushes the boundaries with a larger case size and even greater water resistance.

Omega Seamaster Ploprof 600M:

Classic Design: The Ploprof 600M retains the classic proportions and aesthetic cues of the original model from 1970. It pays homage to the iconic design that revolutionized dive watches and made the Ploprof a legendary timepiece.

600 Meters Water Resistance: With a water resistance of 600 meters (2,000 feet), the Ploprof 600M is still an incredibly capable dive watch, suitable for professional divers and enthusiasts who demand reliability in demanding underwater conditions.

Nostalgia and Heritage: Choosing the Ploprof 600M allows you to connect with the heritage of the Ploprof series and appreciate the design elements that have stood the test of time.

Omega Seamaster Ploprof 1200M:

Larger Case Size: The Ploprof 1200M features a larger case size, embracing contemporary proportions while retaining the iconic asymmetrical design. This larger size can offer a more modern and bold presence on the wrist.

Enhanced Water Resistance: With a remarkable water resistance of 1200 meters (4,000 feet), the Ploprof 1200M pushes the boundaries of underwater performance, making it an ideal choice for extreme diving conditions.

Advanced Materials: The Ploprof 1200M incorporates modern materials and technologies, such as Liquidmetal for the diving scales, enhancing durability and precision.

Performance Innovation: Opting for the Ploprof 1200M reflects a desire for cutting-edge performance and technology. This watch pushes the limits of what a dive watch can achieve.

Choosing Between the Two:

If you value a strong connection to horological history and appreciate the design that defined the Ploprof series, the Ploprof 600M might be the choice for you.

If you’re looking for a dive watch that not only pays homage to tradition but also embraces modern advancements in water resistance and materials, the Ploprof 1200M might better suit your preferences.

The Ploprof 600M is reminiscent of the original design that revolutionized dive watches, while the Ploprof 1200M embraces modern technology with features such as Liquidmetal diving scales and enhanced water resistance up to an astounding 1200 meters. Choosing between the two depends on whether you seek a connection to horological history or a dive watch that pushes the boundaries of performance.

V. Maintenance and Servicing: Omega Seamaster Ploprof 600M

Owning an Omega Seamaster Ploprof 600M comes with the responsibility of proper maintenance to ensure its longevity and optimal performance. Regular servicing, typically every four to five years, is essential to keep the movement accurate and the watch in pristine condition.

1. Regular Servicing:

Omega recommends servicing your watch approximately every four to five years. During servicing, the watch will undergo a thorough inspection, cleaning, lubrication, and adjustment of its movement to ensure accurate timekeeping and reliable performance.

2. Avoid Extreme Conditions:

Protect your Ploprof 600M from extreme temperature variations, as extreme heat or cold can affect the watch’s accuracy and functionality.

3. Magnetic Fields:

Avoid exposing your watch to strong magnetic fields, as this can disrupt the movement’s accuracy. Keep your Ploprof away from devices like speakers, refrigerators, and magnetic closures.

4. Impact and Shock:

While the Ploprof is designed for robustness, avoiding strong impacts or shocks is advisable to prevent damage to the movement or case.

5. Water Resistance:

Despite its impressive water resistance, it’s best to avoid unnecessary submersion in water when not required. The water resistance gaskets may deteriorate over time, so limit water exposure to maintain its integrity.

6. Seawater Exposure:

If your Ploprof comes into contact with seawater, rinse it thoroughly with fresh water afterward. Seawater contains salt that can cause corrosion over time.

7. Winding and Storage:

If you don’t wear your watch daily, consider using a watch winder to keep the movement running smoothly. Store the watch in a cool, dry place away from direct sunlight.

8. Regular Wearing:

Regularly wearing your Ploprof helps keep the movement running smoothly by allowing the lubricants to distribute evenly.

9. Professional Servicing:

When it’s time for servicing, ensure you take your watch to an authorized Omega service center or a reputable watchmaker with experience in servicing luxury watches. Genuine Omega parts and expertise are crucial for maintaining the watch’s integrity.

10. Keep Records:

Keep records of when your watch was last serviced. This helps you stay on top of maintenance schedules and provides a history of care if you ever decide to sell or trade the watch.

Keeping the watch away from extreme temperature variations, magnetic fields, and impacts is crucial. If the watch is exposed to seawater, rinsing it with fresh water afterward can prevent corrosion. Proper care ensures that your Omega Seamaster Ploprof 600M remains a reliable companion on your diving expeditions and daily adventures.


The Omega Seamaster Ploprof series has come a long way from its inception in 1970, evolving into a collection that merges history with innovation. The technology-packed Omega Seamaster Ploprof 600M stands as a testament to Omega’s dedication to producing instruments that not only withstand the depths but also excel in accuracy and reliability. As you explore the various models, features, and maintenance considerations, the Omega Seamaster Ploprof series reveals itself as a true embodiment of horological excellence and a faithful companion to those who venture into the depths of the ocean.


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