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

[US] Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 232.30.46.21.01.001 - Full Set

Omega - 232.30.46.21.01.001 · $4,475

Up for sale is an Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - Full Set Watch functions perfectly mechanically, without issue.

Condition: Fantastic, minor hairlines on case, clasp, or bracelet
Case size: 45.5mm diameter
Water resistance: 600m
Depth rating: 600m

Posted at

Apr 23, 2026, 8:34 AM

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Omega Seamaster Planet Ocean 600M 43.5mm (Ref. 215.30.44.21.01.002) - Full Kit

Omega - 215.30.44.21.01.002 · $2,700

A Omega Planet Ocean 600M with a 43.5mm case, orange accents on the bezel and incredible karma for its owner.

Condition: Excellent
Bracelet material: Steel
Comes with: all boxes and cards

Posted at

Apr 22, 2026, 2:27 PM

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🏒🥅🚨 2026 Omega Seamaster Planet Ocean 600M Co-Axial Master Chronometer — Unworn, White Dial, Orange Bezel — Full Set — Ref. 215.30.44.21.04.001

Omega - 215.30.44.21.04.001 · $6,950

The 2026 Omega Seamaster Planet Ocean 600M pairs a crisp white dial with a vibrant orange bezel for a bold, modern dive watch aesthetic that still feels classically Omega.

Condition: Unworn
Case Size: 43.5 mm
Water Resistance: 600 m
Movement: Master Chronometer

Posted at

Apr 21, 2026, 10:38 PM

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OMEGA Seamaster Planet Ocean 600m 215.32.44.21.01.001 43.5mm

Omega - 215.32.44.21.01.001 · $5,000

This Omega Seamaster Planet Ocean 600M features a 43.5mm case size with a sapphire crystal and an Omega Co-Axial Master Chronometer (Cal. 8900) movement.

Condition: Good, unpolished
Case size: 43.5mm diameter
Movement: Omega Co-Axial Master Chronometer (Cal. 8900)
Crystal: Sapphire

Posted at

Apr 21, 2026, 2:39 PM

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Omega Seamaster Planet Ocean 2201.51 42mm Box and Card - $2,850

Omega - 2201.51 · $2,850

The Omega Seamaster Planet Ocean 2201.51 is an automatic watch with a 42mm steel case, on original Omega steel bracelet.

Condition: Very good condition, minimal marks/hairlines
Case size: 42mm
Bracelet length range: 7-7.25 inches

Posted at

Apr 21, 2026, 4:08 AM

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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 blue ceramic bezel and dial, titanium case, and bracelet, with an Omega Calibre 8500 automatic chronometer.

Condition: Mint
Case size: 42mm diameter
Bracelet material: titanium
Water resistance: 600m / 2000ft

Posted at

Apr 20, 2026, 11:18 AM

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Omega Seamaster Planet Ocean 8500 Orange 45.5mm 232.32.46.21.01.003 on Omega mesh bracelet

Omega - 232.32.46.21.01.003 · $3,600

This Omega Seamaster Planet Ocean Orange 8500 features a gray bezel that was swapped for an OEM orange one, and comes with a new style mesh/milanese bracelet.

Condition: Near mint
Bracelet type: OEM mesh/milanese
Bezel color: orange
Original strap color: black

Posted at

Apr 18, 2026, 10:58 PM

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Omega Seamaster Planet Ocean Chronograph 9300 Orange 45.5mm 232.32.46.51.01.001

Omega - 232.32.46.51.01.001 · $4,500

This Omega Seamaster Planet Ocean Chronograph features a 45.5mm diameter case, an orange strap that was swapped for black, and comes with boxes and warranty.

Case Size: 45.5mm
Strap Color: black (previously orange)
Includes: boxes,warranty

Posted at

Apr 18, 2026, 10:56 PM

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