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

RARE Omega Seamaster Planet Ocean 2500D 45.5mm 2200.50.00

Omega - 2200.50.00 · $3,900

A rare Omega Seamaster Planet Ocean 2500D, featuring a large 45.5mm case size and excellent condition. The watch comes with its original boxes and warranty.

Condition: Excellent
Size: 45.5mm diameter
Case condition: Excellent

Posted at

Apr 18, 2026, 5:24 PM

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2020 Omega Seamaster Planet Ocean 600M 42mm Black 232.30.42.21.01.001 Full Set - $4,395

Omega - 232.30.42.21.01.001 · $4,395

Up for sale is a Omega Seamaster Planet Ocean 600m 42mm Black watch, featuring a 2020 model year.

Condition: Excellent condition with minimal signs of wear
Year: 2020
Contents: watch, inner & outer box, card holder, international warranty card, pictograms card, instructions manual

Posted at

Apr 18, 2026, 5:23 PM

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Omega Seamaster Planet Ocean 8500 45.5mm 232.32.46.21.01.005

Omega - 232.32.46.21.01.005 · $4,500

This is a Omega Seamaster Planet Ocean 8500, a high-end dive watch with a 45.5mm case size and various features.

Condition: great
Case Diameter: 45.5mm

Posted at

Apr 18, 2026, 5:22 PM

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2025 Omega Seamaster Planet Ocean 600m Titanium Blue 232.92.44.22.03.001 Full Set - $4,995

Omega - 232.92.44.22.03.001 · $4,995

A 2025 Omega Seamaster Planet Ocean 600m Titanium Blue, featuring a reference number of 232.92.44.22.03.001.

Condition: Excellent condition with minimal signs of wear
Year: 2025
Depth rating: 600m

Posted at

Apr 18, 2026, 5:04 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

A solid and reliable watch with a great balance of sportiness and everyday versatility.

Condition: Mint
Year: 2025

Posted at

Apr 18, 2026, 3:00 PM

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OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 - COMPLETE SET! 🔥$4,150🔥

OMEGA - 232.32.42.21.01.003 · $4,150

The OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 is a robust and elegant dive watch that embodies OMEGA's commitment to ocean exploration and precision engineering.

Condition: VERY GOOD (few superficial scratches on case)
Movement: Co-Axial Caliber 8500
Case material: stainless steel
Case size: 42mm diameter

Posted at

Apr 17, 2026, 10:09 PM

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Omega Seamaster Planet Ocean “Creamsicle” 215.30.44.21.04.001

Omega - 215.30.44.21.04.001 · $4,498

The Omega Seamaster Planet Ocean 600M 'Creamisicle' is a dive watch that combines performance and style with its orange bezel, stainless steel case, and crisp white dial.

Condition: Pre-owned, great condition
Case diameter: 43.5mm
Depth rating: 600m
Movement type: Self-winding mechanical

Posted at

Apr 17, 2026, 3:50 PM

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Omega Seamaster Planet Ocean 2200.51 – 42mm – Full Set –

Omega - 2200.51 · $4,195

The Omega Seamaster Planet Ocean is a great everyday diver with strong build quality and classic design, featuring the Co-Axial movement in a 42mm stainless steel case.

Condition: Very clean overall with light wear consistent with age
Case size: 42mm diameter
Movement type: Automatic (Caliber 2500)
Water resistance: 600m depth rating

Posted at

Apr 17, 2026, 8:24 AM

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Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium –

Omega - 232.92.42.21.03.001 · $12,000

Case material: titanium
Diameter: 42mm

Posted at

Apr 17, 2026, 8:18 AM

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