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

Reference 232.18.42.21.04.001

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

About this watch

The Omega Seamaster Planet Ocean 600M Co-Axial 42 is a stunning blend of elegance and functionality, featuring a 42mm stainless steel case with a rotating bezel and sapphire crystal glass. This luxury timepiece boasts exceptional water resistance of 600 meters, making it perfect for professional divers. The automatic movement, Omega caliber 8500, operates at 25,200 vibrations per hour and features a Co-Axial escapement for enhanced accuracy and longevity. With a power reserve of 60 hours, this watch is reliable and precise, certified as a chronometer after rigorous testing. The white dial with mixed indexes provides a fresh aesthetic, complemented by an alligator leather strap that enhances the overall elegance of the watch. Whether you're attending a formal event or diving into the deep blue, this watch is versatile enough to adapt to any situation.
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MSRP: $17,100
Market Price: $5,683

Key Features

  • 42mm stainless steel case
  • Rotating bezel with 0-60 (Dive) markings
  • Sapphire crystal glass for scratch resistance
  • Omega caliber 8500 automatic movement
  • Co-Axial escapement for enhanced accuracy and longevity
  • Water resistance of 600 meters (2000 feet)
  • Chronometer certified after rigorous testing

Specifications

Brand
Omega
Family
Seamaster Planet Ocean
Model
Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Diamond / White / Alligator
Reference
232.18.42.21.04.001
Movement
8500
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 42mm
Dial Color
White
Crystal
Sapphire
Water Resistance
600

Current Listings

[WTS] 2020 Omega Seamaster Planet Ocean 600M 42mm Black 232.30.42.21.01.001 Full Set - $4,395

2020 Omega Seamaster Planet Ocean 600M 42mm Black 232.30.42.21.01.001 Full Set - $4,395

Omega - 232.30.42.21.01.001 · $4,395
Up for sale is a Omega Seamaster Planet Ocean 600m 42mm Black watch, featuring a 2020 model year.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2020
  • Contents: watch, inner & outer box, card holder, international warranty card, pictograms card, instructions manual
Posted at
Apr 18, 2026, 5:23 PM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean 8500 45.5mm 232.32.46.21.01.005

Omega Seamaster Planet Ocean 8500 45.5mm 232.32.46.21.01.005

Omega - 232.32.46.21.01.005 · $4,500
This is a Omega Seamaster Planet Ocean 8500, a high-end dive watch with a 45.5mm case size and various features.

  • Condition: great
  • Case Diameter: 45.5mm
Posted at
Apr 18, 2026, 5:22 PM
Active
View listing on r/WatchExchange
[WTS] 2025 Omega Seamaster Planet Ocean 600m Titanium Blue 232.92.44.22.03.001 Full Set - $4,995

2025 Omega Seamaster Planet Ocean 600m Titanium Blue 232.92.44.22.03.001 Full Set - $4,995

Omega - 232.92.44.22.03.001 · $4,995
A 2025 Omega Seamaster Planet Ocean 600m Titanium Blue, featuring a reference number of 232.92.44.22.03.001.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2025
  • Depth rating: 600m
Posted at
Apr 18, 2026, 5:04 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean Dec 2025 Ref. 217.32.42.21.01.002 – Mint Full Set – $6,750

Omega Seamaster Planet Ocean Dec 2025 Ref. 217.32.42.21.01.002 – Mint Full Set – $6,750

Omega - 217.32.42.21.01.002 · $6,750
A solid and reliable watch with a great balance of sportiness and everyday versatility.

  • Condition: Mint
  • Year: 2025
Posted at
Apr 18, 2026, 3:00 PM
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[WTS] OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 - COMPLETE SET! 🔥$4,150🔥

OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 - COMPLETE SET! 🔥$4,150🔥

OMEGA - 232.32.42.21.01.003 · $4,150
The OMEGA Seamaster Planet Ocean 600M Ref. 232.32.42.21.01.003 is a robust and elegant dive watch that embodies OMEGA's commitment to ocean exploration and precision engineering.

  • Condition: VERY GOOD (few superficial scratches on case)
  • Movement: Co-Axial Caliber 8500
  • Case material: stainless steel
  • Case size: 42mm diameter
Posted at
Apr 17, 2026, 10:09 PM
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View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean “Creamsicle” 215.30.44.21.04.001

Omega Seamaster Planet Ocean “Creamsicle” 215.30.44.21.04.001

Omega - 215.30.44.21.04.001 · $4,498
The Omega Seamaster Planet Ocean 600M 'Creamisicle' is a dive watch that combines performance and style with its orange bezel, stainless steel case, and crisp white dial.

  • Condition: Pre-owned, great condition
  • Case diameter: 43.5mm
  • Depth rating: 600m
  • Movement type: Self-winding mechanical
Posted at
Apr 17, 2026, 3:50 PM
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[WTS] Omega Seamaster Planet Ocean 2200.51 – 42mm – Full Set –

Omega Seamaster Planet Ocean 2200.51 – 42mm – Full Set –

Omega - 2200.51 · $4,195
The Omega Seamaster Planet Ocean is a great everyday diver with strong build quality and classic design, featuring the Co-Axial movement in a 42mm stainless steel case.

  • Condition: Very clean overall with light wear consistent with age
  • Case size: 42mm diameter
  • Movement type: Automatic (Caliber 2500)
  • Water resistance: 600m depth rating
Posted at
Apr 17, 2026, 8:24 AM
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[WTS] Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium –

Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium –

Omega - 232.92.42.21.03.001 · $12,000
  • Case material: titanium
  • Diameter: 42mm
Posted at
Apr 17, 2026, 8:18 AM
Active
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[WTS] 2020 Omega Seamaster Planet Ocean 600M 42mm Black 232.30.42.21.01.001 Full Set - $4,395

2020 Omega Seamaster Planet Ocean 600M 42mm Black 232.30.42.21.01.001 Full Set - $4,395

Omega - 232.30.42.21.01.001 · $4,395
Up for sale is a Omega Seamaster Planet Ocean 600m 42mm Black, a 2020 model with all original accessories.

  • Condition: Excellent condition with minimal signs of wear
  • Depth Rating: 600m
Posted at
Apr 16, 2026, 6:40 PM
Active
View listing on r/WatchExchange