Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Diamond / Black / Alligator

Reference 232.18.42.21.01.001

Omega Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Diamond / Black / Alligator

About this watch

The Omega Seamaster Planet Ocean 600M Co-Axial is a statement timepiece that marries functionality with style, boasting a robust design and impressive functionalities. Its black dial adorned with diamond hour markers exudes luxury without being ostentatious, while the gem-set bezel adds an element of sophistication. Powered by the Omega caliber 8500 movement, this automatic watch features a dual-barrel design providing 60 hours of power reserve and a Co-Axial escapement that enhances accuracy and extends its lifespan. With a water resistance of up to 600 meters and a certified chronometer rating, it's built for serious divers who require precision and reliability. The included alligator leather strap feels luxurious against the skin while being durable enough for daily wear. Weighing in at a comfortable amount, this watch strikes a perfect balance between sturdiness and lightness. It's versatile enough to transition from a dive to a dinner date seamlessly.
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Key Features

  • Omega caliber 8500 automatic movement
  • Dual-barrel design with 60 hours of power reserve
  • Co-Axial escapement for enhanced accuracy and lifespan
  • Water resistance up to 600 meters
  • Certified chronometer rating
  • Gem-set bezel for easy tracking of elapsed time
  • Stainless steel case with polished finish
  • Sapphire crystal for scratch-resistance and anti-reflective coating

Specifications

Brand
Omega
Family
Seamaster Planet Ocean
Model
Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Diamond / Black / Alligator
Reference
232.18.42.21.01.001
Movement
8500
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 42mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
600

Current Listings

[WTS] Omega Seamaster Planet Ocean 232.30.38.20.01.001 38mm Box and Papers - $2,990

Omega Seamaster Planet Ocean 232.30.38.20.01.001 38mm Box and Papers - $2,990

Omega - 232.30.38.20.01.001 · $2,990
Up for sale is my Omega Seamaster Planet Ocean 232.30.38.20.01.001, a 38mm automatic watch with an Omega 8520 movement.

  • Condition: Great condition for its age, minimal marks/hairlines
  • Case Size: 38mm diameter
  • Movement: Omega 8520, automatic
  • Bracelet Length: fits up to 7-7.25 inch wrists depending on wrist shape
Posted at
May 22, 2026, 4:13 AM
Active
View listing on r/WatchExchange
[WTS] 2024 Omega Seamaster Planet Ocean 600M 43.5mm Black 232.30.44.22.01.001 Full Set - $4,595

2024 Omega Seamaster Planet Ocean 600M 43.5mm Black 232.30.44.22.01.001 Full Set - $4,595

Omega - 232.30.44.22.01.001 · $4,595
Up for sale is a Omega Seamaster Planet Ocean 600M 43.5mm Black, reference 232.30.44.22.01.001 from 2024.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2024
  • Case size: 43.5mm
  • Depth rating: 600m
Posted at
May 21, 2026, 7:37 PM
Active
View listing on r/WatchExchange
[WTS] 2019 Omega Seamaster Planet Ocean 600M 43.5mm Black 215.30.44.21.01.001 Full Set - $4,595

2019 Omega Seamaster Planet Ocean 600M 43.5mm Black 215.30.44.21.01.001 Full Set - $4,595

Omega - 215.30.44.21.01.001 · $4,595
A black Omega Seamaster Planet Ocean 600M in excellent condition, available for sale.

  • Condition: Excellent condition with minimal signs of wear
  • Case size: 43.5mm
  • Depth rating: 600m
Posted at
May 21, 2026, 7:35 PM
Active
View listing on r/WatchExchange
[WTS][US] Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 232.30.46.21.01.001 - Full Set

[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 · $4,375
Up for sale is an Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm.

  • Condition: Fantastic with minor hairlines on case, clasp, or bracelet
  • Case Size: 45.5mm diameter
  • Depth Rating: 600m
Posted at
May 21, 2026, 6:19 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 37.5mm

Omega Seamaster Planet Ocean 37.5mm

Omega - 232.90.38.20.03.001 · $3,600
This Omega Seamaster Planet Ocean is a 37.5mm titanium watch that feels proportionate on smaller wrists while maintaining its character.

  • Condition: Honest wearable condition with minor marks on the bezel and crown
  • Movement: Omega 8520 Co-Axial Chronometer
  • Power reserve: 50 hours
  • Case material: Grade 5 Titanium
Posted at
May 21, 2026, 12:45 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M Ultra Deep | Complete set + more

Omega Seamaster Planet Ocean 600M Ultra Deep | Complete set + more

Omega - 215.30.46.21.03.001 · $8,250
This Omega Seamaster Planet Ocean 600M Ultra Deep is a high-end dive watch with impressive features and a rich history.

  • Condition: Excellent sparingly worn condition
  • Authenticity guarantee: 100% guaranteed authentic
  • Shipping: Fully insured FedEx Overnight Priority shipping
  • Includes: Original bracelet, rubber strap, warranty card
Posted at
May 20, 2026, 6:56 PM
Active
View listing on r/WatchExchange
[WTS] 2020 Omega Seamaster Planet Ocean 600m Full Set $3850

2020 Omega Seamaster Planet Ocean 600m Full Set $3850

Omega - 232.30.46.21.01.001 · $3,850
This Omega Seamaster Planet Ocean 600M is a professional dive watch with incredible wrist presence, clean design, and exceptional reliability.

  • Movement: Omega Calibre 8500 automatic
  • Case size: 45.5MM diameter
  • Depth rating: 600M / 2000FT
Posted at
May 19, 2026, 9:45 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2201.50 42mm - $2,990

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

Omega - 2201.50 · $2,990
The Omega Seamaster Planet Ocean 2201.50 is a 42mm automatic watch featuring an Omega Calibre 2500 movement.

  • Condition: Great condition for its age
  • Case size: 42mm diameter
  • Bracelet length: fits up to 7.25-7.5inch wrists depending on wrist shape
  • Movement: automatic Omega Calibre 2500
Posted at
May 19, 2026, 9:02 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M “Creamsicle” 43.5mm Ref. 215.30.44.21.04.001 Full Set

Omega Seamaster Planet Ocean 600M “Creamsicle” 43.5mm Ref. 215.30.44.21.04.001 Full Set

Omega - 215.30.44.21.04.001 · $4,900
Up for sale is a beautiful Omega Seamaster Planet Ocean 600M “Creamsicle,” ref. 215.30.44.21.04.001, featuring the white dial paired with the orange ceramic bezel in the versatile 43.5mm case size.

  • Condition: good overall condition, minor signs of wear
  • Case size: 43.5mm diameter
  • Water resistance: 600m
  • Caliber: Omega Co-Axial Master Chronometer Cal. 8900
Posted at
May 19, 2026, 8:14 PM
Active
View listing on r/WatchExchange