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][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 · $4,400
This Omega Seamaster Planet Ocean features a black dial and measures 45.5mm in diameter.

  • Condition: Fantastic with minor hairlines on case, clasp, or bracelet
  • Case size: 45.5mm diameter
  • Water resistance: 600m depth rating
Posted at
May 14, 2026, 7:19 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2201.51 42mm - $2,690

Omega Seamaster Planet Ocean 2201.51 42mm - $2,690

Omega - Planet Ocean 2201.51 · $2,690
This Omega Seamaster Planet Ocean 2201.51 is a 42mm automatic watch with an Omega Calibre 2500 movement. It has a steel case and original Omega steel bracelet.

  • Condition: Very good condition, with minimal marks/hairlines on case and bracelet
  • Case size: 42mm diameter
  • Movement: Omega Calibre 2500
  • Crystal type: AR Coating
Posted at
May 14, 2026, 4:30 AM
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[WTS] Omega Seamaster Planet Ocean 600M – 42mm Titanium – Mint Set

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

Omega - 232.90.42.21.03.001 · $4,950
The Omega Seamaster Planet Ocean 600M features a titanium case and bracelet, blue ceramic bezel and dial, and an automatic chronometer movement.

  • Condition: Mint condition
  • Case size: 42mm
  • Water resistance: 2000ft / 600m
  • Movement: Omega Calibre 8500 automatic chronometer
Posted at
May 13, 2026, 12:51 PM
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[WTS] Omega Seamaster Planet Ocean Orange 232.30.42 42mm - $3,350 - Reserved Post for u/3twellv

Omega Seamaster Planet Ocean Orange 232.30.42 42mm - $3,350 - Reserved Post for u/3twellv

Omega - 232.30.42.21.01.002 · $3,350
This Omega Seamaster Planet Ocean Orange features a steel case and original Omega steel bracelet. It has a clean crystal and AR coating, and all functions are working well.

  • Condition: Excellent (8.8/10) - minimal marks/hairlines on case, bezel insert and bracelet
  • Case size: 42mm diameter
  • Bracelet type: Original Omega steel bracelet
  • Bezel material: Steel
Posted at
May 13, 2026, 3:59 AM
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[WTS] 2019 OMEGA Seamaster Planet Ocean PyeongChang Limited Edition 522.32.44.21.03.001 - Inner box and papers

2019 OMEGA Seamaster Planet Ocean PyeongChang Limited Edition 522.32.44.21.03.001 - Inner box and papers

OMEGA - 522.32.44.21.03.001 · $5,698
This Omega Seamaster Planet Ocean PyeongChang Limited Edition is a unique timepiece crafted to celebrate the 2018 Olympic Winter Games in South Korea, featuring a sporty yet elegant design and coming with two straps and an exclusive presentation box.

  • Condition: Very good pre-owned condition
  • Limited Edition Quantity: 2,018 pieces worldwide
  • Case Size: not specified
  • Bracelet Length: fits up to 7" wrist
Posted at
May 12, 2026, 11:56 PM
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[WTS] Omega Seamaster Planet Ocean. Box, Card. 232.32.46.21.01.003.

Omega Seamaster Planet Ocean. Box, Card. 232.32.46.21.01.003.

Omega - 232.32.46.21.01.003 · $3,150
Omega Seamaster Planet Ocean is a high-end watch with advanced features and sleek design. It comes with a box and card, providing authenticity and added value.

  • Box: yes
  • Card: yes
Posted at
May 12, 2026, 8:05 PM
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[WTS] Omega Seamaster Planet Ocean 600m “Sochi 2014” Limited Edition - 2021 Box and Papers - 522.30.46.21.01.001 - Price Reduced to $3999

Omega Seamaster Planet Ocean 600m “Sochi 2014” Limited Edition - 2021 Box and Papers - 522.30.46.21.01.001 - Price Reduced to $3999

Omega - 522.30.46.21.01.001 · $3,999
This Omega Seamaster Planet Ocean 600m 'Sochi 2014' Limited Edition is a unique timepiece featuring the Olympic rings and the Sochi logo on the dial.

  • Water resistance depth rating: 600m
Posted at
May 12, 2026, 5:47 PM
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[WTS] Omega Seamaster Planet Ocean 2201.50 42mm with Box & Papers - US Based $4100 Shipped

Omega Seamaster Planet Ocean 2201.50 42mm with Box & Papers - US Based $4100 Shipped

Omega - 2201.50 · $4,100
A Omega Seamaster Planet Ocean 42mm Gen 1, it comes in its original box with papers and manual.

  • Condition: Excellent (minor scratches on bracelet and bezel)
  • Bracelet condition: Minor scratches
  • Crystal condition: Completely fresh
  • Box condition: Great
Posted at
May 12, 2026, 1:01 AM
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[WTS] PRICE REDUCTION - Omega Seamaster Planet Ocean 43.5MM Blue 215.30.44.21.03.001 - Box and Ebay Authentication Card - $4,250

PRICE REDUCTION - Omega Seamaster Planet Ocean 43.5MM Blue 215.30.44.21.03.001 - Box and Ebay Authentication Card - $4,250

Omega - 215.30.44.21.03.001 · $4,250
This Omega Seamaster Planet Ocean is a 43.5MM stainless steel watch in the blue color, powered by the Caliber 8900 movement and featuring a ceramic bezel rated to 600m/2000ft.

  • Condition: Excellent overall with light surface wear and minor hairlines
  • Depth Rating: 600m
  • Case Size: 43.5mm diameter
  • Bracelet Length: 7.6 inch
Posted at
May 11, 2026, 7:30 AM
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