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

[WTS] Omega Seamaster Planet Ocean GMT “Oreo” - 215.30.44.22.01.001 - Price Reduced!

Omega Seamaster Planet Ocean GMT “Oreo” - 215.30.44.22.01.001 - Price Reduced!

Omega - 215.30.44.22.01.001 · $4,695
This Omega Seamaster Planet Ocean GMT features a 43.5mm size and has been well-maintained, showing only light scratches on the clasp and bracelet.

  • Condition: very good with minor wear
  • Case Size: 43.5mm diameter
  • Water Resistance: 300m depth rating
  • Accuracy: +/-0 seconds per day
Posted at
Feb 26, 2026, 12:58 PM
Active
View listing on r/WatchExchange
[WTS] 2017 Omega Seamaster Planet Ocean 600m 45.5mm 232.30.46.21.01.002 | FRESH SERVICE!

2017 Omega Seamaster Planet Ocean 600m 45.5mm 232.30.46.21.01.002 | FRESH SERVICE!

Omega - 232.30.46.21.01.002 · $3,250
A 2017 Omega Seamaster Planet Ocean 600m in excellent condition, recently serviced and running great.

  • Year: 2017
  • Case size: 45.5mm
  • Water resistance: 600m
Posted at
Feb 25, 2026, 5:19 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M 232.30.42.21.01.003 | 2024 Full Set

Omega Seamaster Planet Ocean 600M 232.30.42.21.01.003 | 2024 Full Set

Omega - 232.30.42.21.01.003 · $3,750
The seller is listing a 2024 Omega Seamaster Planet Ocean 600M, a 42mm watch in excellent condition with some minor cosmetic imperfections.

  • Condition: Pre-Owned
  • Case size: 42mm
  • Water resistance: 600m
  • Service history: Unknown
Posted at
Feb 24, 2026, 9:40 PM
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[WTS] Omega Seamaster Planet Ocean GMT “Oreo” 215.30.44.22.01.001 — Full Set

Omega Seamaster Planet Ocean GMT “Oreo” 215.30.44.22.01.001 — Full Set

Omega - 215.30.44.22.01.001 · $6,995
The Omega Seamaster Planet Ocean GMT “Oreo” is a modern 43.5mm watch with a black/white bezel and METAS Master Chronometer certification.

  • Condition: Excellent overall condition
  • Case Size: 43.5mm
  • Case Material: Stainless steel
  • Bezel Type: Black/White timing bezel
Posted at
Feb 24, 2026, 6:59 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2201.50 42mm Full Kit - $3,250

Omega Seamaster Planet Ocean 2201.50 42mm Full Kit - $3,250

Omega - 2201.50 · $3,250
The Omega Seamaster Planet Ocean 2201.50 is a 42mm automatic watch with an Omega Calibre 2500 movement, available as a full kit including double box and triple cards.

  • Condition: Very good condition with minimal marks/hairlines on the case, caseback, and bracelet.
  • Case size: 42mm diameter
  • Movement: automatic Omega Calibre 2500
  • Bracelet material: steel
Posted at
Feb 23, 2026, 9:19 PM
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View listing on r/WatchExchange
[WTS] 2020 Omega Seamaster Planet Ocean Black Dial with Orange Bezel on Bracelet 215.30.44.21.01.002 B+P

2020 Omega Seamaster Planet Ocean Black Dial with Orange Bezel on Bracelet 215.30.44.21.01.002 B+P

Omega - 215.30.44.21.01.002 · $4,700
This 2020 Omega Seamaster Planet Ocean is a rugged yet refined dive watch, featuring a sharp black dial and matching black and orange ceramic bezel. It offers serious durability along with Omega’s reliable in-house movement for everyday performance you can count on.

  • Condition: Good condition, some signs of wear on clasp, bracelet, case, and bezel
  • Case diameter: 43.5mm
  • Crystal: Sapphire crystal
  • Bracelet material: Stainless Steel
Posted at
Feb 23, 2026, 1:09 PM
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[WTS] BNIB Omega Seamaster Planet Ocean

BNIB Omega Seamaster Planet Ocean

Omega - 217.30.42.21.01.002 · $8,075
A brand new stickered, unworn Omega Seamaster Planet Ocean with black dial and blue bezel combination on the bracelet.

  • Condition: Brand new in box (BNIB)
  • Movement type: Mechanical
  • Dial color: Black
  • Bezel color: Blue
Posted at
Feb 22, 2026, 4:25 PM
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[WTS] Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

Omega - 215.30.46.51.01.001 · $6,700
An Omega Seamaster Planet Ocean 600m with a black dial and 45.5mm case, featuring mechanical functionality without issues.

  • Condition: Fantastic with minor hairlines
  • Case Diameter: 45.5mm
  • Water Resistance: 600m
Posted at
Feb 22, 2026, 12:22 PM
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2021 Omega Seamaster Planet Ocean �Oreo� GMT -215.30.44.22.01.001 - BPs + Extra

2021 Omega Seamaster Planet Ocean �Oreo� GMT -215.30.44.22.01.001 - BPs + Extra

Omega - 215.30.44.22.01.001 · $5,700
2021 Omega Seamaster Planet Ocean 'Oreo' GMT is a luxury watch with minor wear on the case.

  • Condition: Very Good Condition
  • Case Wear: Minor
  • Box Condition: Outer white box flap is loose
  • Accessories: Double Box,All 3 Omega Cards (Warranty dated 6/8/21),Hangtag, Manual, Customer Service papers,Extra Black/white Rubber Strap
Posted at
Apr 4, 2025, 3:36 PM
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View listing on RolexForums