Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Black / Rubber

Reference 2900.50.81

Omega Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Black / Rubber

About this watch

The Omega Seamaster Planet Ocean 600M Co-Axial 2900.50.81 is a masterpiece of Swiss craftsmanship, embodying the essence of diving heritage and luxury. This watch boasts an impressive water resistance of up to 600 meters, making it perfect for professional divers and those who enjoy aquatic sports. The bold design features a black dial with mixed indexes, creating a striking contrast against the stainless steel case. The rotating bezel, marked from 0 to 60, allows divers to track their immersion time accurately. At the heart of this watch is the Omega caliber 2500 movement, a marvel of engineering that offers a power reserve of up to 48 hours and a frequency rate of 25,200 vibrations per hour. With its Co-Axial escapement, this movement reduces friction between parts and enhances precision. The Seamaster Planet Ocean is a certified chronometer, undergoing rigorous testing to ensure its accuracy. Whether you're diving into the ocean or attending a formal event, this watch adapts seamlessly to any occasion. Its simple yet effective layout makes reading the time a breeze, while the luminous hands ensure readability in low-light conditions.

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MSRP: $4,400

Market Price: $3,328

Key Features

Omega caliber 2500 movement
600 meters water resistance
Stainless steel case with rotating bezel
Sapphire glass for scratch resistance
Black dial with mixed indexes and luminous hands
45.5 mm diameter for a robust presence on the wrist
Co-Axial escapement for reduced friction and enhanced precision

Specifications

Brand

Omega

Family

Seamaster Planet Ocean

Model

Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Black / Rubber

Reference

2900.50.81

Movement

2500

Movement Features

Hours, Minutes, Seconds
Date
Co-Axial Escapement, Chronometer

Case

Stainless Steel 45.5mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

600

Current Listings

Omega Seamaster Planet Ocean 600M – 42mm Titanium – Complete set

Omega - 232.90.42.21.03.001 · $4,950

This Omega Seamaster Planet Ocean 600M features a 42mm titanium case, blue ceramic bezel and dial, and an automatic chronometer movement with 600 meter water resistance.

Condition: Mint condition
Case material: Titanium
Bracelet material: Titanium
Water resistance: 2000 feet / 600 meters

Posted at

Apr 29, 2026, 11:07 AM

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Omega Seamaster Planet Ocean GMT 43.5mm Black/Orange Dial | 2021 Full Set |232.32.44.22.01.002

Omega - 232.32.44.22.01.002 · $3,750

The Omega Seamaster Planet Ocean GMT features a 43.5mm case with a black and orange dial, including the GMT function.

Condition: Great condition
Case diameter: 43.5mm
Material: Black/Orange Dial

Posted at

Apr 29, 2026, 12:14 AM

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Omega Seamaster Planet Ocean 232.30.46.21.01.001 – 45.5mm – 2015 – Full Set

Omega - 232.30.46.21.01.001 · $3,950

This Omega Seamaster Planet Ocean 45.5mm is a bold dive watch with strong wrist presence and Omega’s proven Co-Axial movement, built for durability and performance.

Condition: Good overall condition
Case size: 45.5mm
Movement type: Omega Co-Axial automatic
Crystal material: Sapphire crystal

Posted at

Apr 28, 2026, 12:46 PM

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Omega Seamaster Planet Ocean 232.30.42 42mm Box and Papers - $3,650 - Reserved Post for u/Confident_Wallaby611

Omega - 232.30.42 · $3,650

A pre-owned Omega Seamaster Planet Ocean in excellent condition, with a steel case and original bracelet.

Condition: Pre-owned in great condition with minimal marks/hairlines
Case size: 42mm diameter
Bracelet type: original Omega steel
Box and papers included: yes

Posted at

Apr 27, 2026, 10:10 PM

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Omega Seamaster Planet Ocean 2201.50 42mm - $2,650 - US BASED!

Omega - 2201.50 · $2,650

Up for sale is my Omega Seamaster Planet Ocean 2201.50, a 42mm watch with an automatic Omega Calibre 2500 movement.

Condition: Very good condition with minimal marks/hairlines and light marks on bezel insert
Case size: 42mm diameter
Movement type: Automatic
Bracelet material: Steel

Posted at

Apr 27, 2026, 9:21 PM

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Omega Seamaster Planet Ocean 600m 2201.51 42mm - $2,690

Omega - 2201.51 · $2,690

Up for sale is the Omega Seamaster Planet Ocean 600m with an automatic Omega Calibre 2500 movement, measuring at 42mm in diameter. This watch has all functions working well within COSC standards.

Condition: great condition for its age
Case size: 42mm
Movement: Omega Calibre 2500
Bracelet size: 7-7.25 inch

Posted at

Apr 26, 2026, 9:51 PM

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Omega Seamaster Planet Ocean Dec 2025 Ref. 217.32.42.21.01.002 – Mint Full Set – $6,750

Omega - 217.32.42.21.01.002 · $6,750

The Omega Seamaster Planet Ocean is a solid and reliable watch with a great balance of sportiness and everyday versatility.

Condition: mint condition
Date Of Manufacture: December 2025

Posted at

Apr 26, 2026, 7:48 AM

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Omega Seamaster Planet Ocean 600M | Ref. 2201.51 | 42mm | Black Dial w/ Orange Numerals | Full Set

Omega - 2201.51 · $3,750

The Omega Seamaster Planet Ocean 600M is a modern Seamaster associated with the bold era of 007, featuring a matte black dial and iconic orange numerals.

Condition: Excellent
Diameter: 42mm
Movement generation: first-generation Co-Axial

Posted at

Apr 25, 2026, 10:51 AM

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