Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 37.5 Stainless Steel / Diamond / Black / Alligator

Reference 232.18.38.20.01.001

Omega Seamaster Planet Ocean 600M Co-Axial 37.5 Stainless Steel / Diamond / Black / Alligator

About this watch

The Omega Seamaster Planet Ocean 600M Co-Axial is a true masterpiece, encapsulating the spirit of exploration while offering a refined aesthetic. This watch combines luxury with functionality, making it perfect for various individuals. Its stunning design features a black dial adorned with mixed indexes and arrow hands, adding a sophisticated touch that catches the light beautifully. The gem-set bezel elevates its luxurious appeal, making it a conversation starter wherever you go. At the heart of this exquisite watch lies the Omega caliber 8520, an automatic movement delivering exceptional accuracy. With a frequency of 25,200 vibrations per hour and chronometer certification, this watch meets stringent industry standards. Its impressive water resistance of 600 meters makes it perfect for underwater adventures or everyday wear and tear. The combination of stainless steel and sapphire glass ensures durability and scratch resistance. This timepiece is an investment offering incredible value, considering its intricate craftsmanship, high-quality materials, and the Omega brand's reputation in the watchmaking industry.
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Key Features

  • Automatic Omega caliber 8520 movement
  • Stainless Steel case with gem-set bezel
  • Sapphire crystal glass for durability and scratch resistance
  • Water Resistance: 600 meters
  • Black alligator strap for a classy aesthetic
  • Chronometer certification for exceptional accuracy
  • 50-hour power reserve

Specifications

Brand
Omega
Family
Seamaster Planet Ocean
Model
Seamaster Planet Ocean 600M Co-Axial 37.5 Stainless Steel / Diamond / Black / Alligator
Reference
232.18.38.20.01.001
Movement
8520
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 37.5mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
600

Current Listings

[WTS] Omega Seamaster Planet Ocean 600m 42mm, 232.30.42.21.01.003 with black dial, (orange 6, 9, 12), w/ box & papers

Omega Seamaster Planet Ocean 600m 42mm, 232.30.42.21.01.003 with black dial, (orange 6, 9, 12), w/ box & papers

Omega - 232.30.42.21.01.003 · $4,100
The Omega Seamaster Planet Ocean 600m 42mm features a classic dive watch design with a black dial, orange numerals, and stainless steel bracelet.

  • Condition: Excellent, previously cherished condition
  • Case diameter: 42mm
  • Water resistance: 600m
  • Bracelet size capacity: up to 7.5" wrist
Posted at
Mar 19, 2026, 1:35 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2201.50 42mm Box and Cards - $2,990

Omega Seamaster Planet Ocean 2201.50 42mm Box and Cards - $2,990

Omega - 2201.50 · $2,990
Up for sale is my great condition Omega Seamaster Planet Ocean 2201.50, measuring at 42mm with an automatic Omega Calibre 2500 movement.

  • Condition: Very good condition for its age with minimal marks/hairlines
  • Case size: 42mm diameter
  • Movement: Omega Calibre 2500
  • Bracelet type: original Omega steel bracelet
Posted at
Mar 19, 2026, 4:52 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M – 42mm Titanium – 2025 Set

Omega Seamaster Planet Ocean 600M – 42mm Titanium – 2025 Set

Omega - 232.90.42.21.03.001 · $5,350
The Omega Seamaster Planet Ocean 600M features a titanium 42mm case and bracelet, with a blue ceramic bezel and dial.

  • Condition: Mint condition
  • Case Size: 42mm diameter
  • Water Resistance: 600m / 2000ft
  • Movement: Omega Calibre 8500
Posted at
Mar 18, 2026, 3:33 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean - 2200.50

Omega Seamaster Planet Ocean - 2200.50

Omega - 2200.50 · $3,300
This Omega Seamaster Planet Ocean ref. 2200.50 is the classic Co-Axial model powered by Omega caliber 2500, featuring a black dial and black bezel, along with sapphire crystal and 600m water resistance.

  • Condition: Pre-owned with scratches on AR coating
  • Water Resistance: 600m
  • Case Size: 45.5mm diameter
  • Movement: Omega caliber 2500 (Co-Axial)
Posted at
Mar 18, 2026, 10:18 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean Blk & Orange $5299

Omega Seamaster Planet Ocean Blk & Orange $5299

Omega - Seamaster Planet Ocean · $5,299
a black and orange Omega Seamaster Planet Ocean watch for sale

  • Color: Black & Orange
Posted at
Mar 17, 2026, 9:09 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean Good Planet Foundation Ref: 232.32.44.22.03.001 | Full Set

Omega Seamaster Planet Ocean Good Planet Foundation Ref: 232.32.44.22.03.001 | Full Set

Omega - 232.32.44.22.03.001 · $4,500
A 43.5mm stainless steel Omega Seamaster Planet Ocean 600M 'Good Planet' watch with a vibrant blue dial, polished blue ceramic bezel, and orange GMT accents.

  • Case diameter: 43.5 mm
  • Thickness: 17.25 mm
  • Lug width: 21 mm
Posted at
Mar 16, 2026, 10:00 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M 45.5 mm, steel on steel $3200

Omega Seamaster Planet Ocean 600M 45.5 mm, steel on steel $3200

Omega - 2208.50.00 · $3,200
The Omega Seamaster Planet Ocean 600M is a stylish dive watch that pays homage to OMEGA’s maritime legacy, featuring a black dial with a date window and an orange unidirectional rotating divers’ bezel on a stainless steel case.

  • Case Diameter: 45.5 mm
  • Water Resistance: 600m / 60 bar
  • Movement Power Reserve: 48 hours
Posted at
Mar 16, 2026, 5:47 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600m, 2201.51, 42mm, Black Dial and Bezel, Steel Bracelet, Box & Papers

Omega Seamaster Planet Ocean 600m, 2201.51, 42mm, Black Dial and Bezel, Steel Bracelet, Box & Papers

Omega - 2201.51 · $3,600
The Omega Seamaster Planet Ocean 600m is a classic dive watch with a functional combination of features, including a 42mm case diameter and distinctive black dial.

  • Condition: Very good, previously cherished condition
  • Case diameter: 42mm
  • Bracelet length: fits 7.25" wrist comfortably with 2 extra links
Posted at
Mar 16, 2026, 3:10 PM
Active
View listing on r/WatchExchange
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
Active
View listing on RolexForums