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] Omega Seamaster Planet Ocean 45.5mm 232.32.46.21.01.005

Omega Seamaster Planet Ocean 45.5mm 232.32.46.21.01.005

Omega - 232.32.46.21.01.005 · $4,500
A Omega Seamaster Planet Ocean watch with a 45.5mm case size, featuring the 8500 movement.

  • Condition: great condition
  • Case size: 45.5mm diameter
  • Movement: 8500
Posted at
May 16, 2026, 10:07 PM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean Titanium 232.90.46.21.03.001 45.5mm

Omega Seamaster Planet Ocean Titanium 232.90.46.21.03.001 45.5mm

Omega - 232.90.46.21.03.001 · $4,600
This Omega Seamaster Planet Ocean 232.90.46.21.03.001 is a titanium model with a 45.5mm case size.

  • Condition: Excellent condition
  • Case size: 45.5mm diameter
Posted at
May 16, 2026, 10:03 PM
Active
View listing on r/WatchExchange
[WTS][US] Omega Seamaster Planet Ocean Chrono 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

[US] Omega Seamaster Planet Ocean Chrono 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

Omega - 215.30.46.51.01.001 · $6,550
This Omega Seamaster Planet Ocean Chrono features a black dial, 45.5mm case and 600m water resistance.

  • Condition: Fantastic with minor hairlines
  • Case Size: 45.5mm diameter
  • Depth Rating: 600m
Posted at
May 16, 2026, 3:10 PM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean GMT Titanium 232.92.44.22.03.001 43.5mm under warranty

Omega Seamaster Planet Ocean GMT Titanium 232.92.44.22.03.001 43.5mm under warranty

Omega - 232.92.44.22.03.001 · $5,200
This Omega Seamaster Planet Ocean GMT Titanium is a 43.5mm watch with factory warranty valid through AUG 2027.

  • Condition: Excellent condition
  • Model: Seamaster Planet Ocean GMT Titanium
  • Size: 43.5mm diameter
Posted at
May 16, 2026, 12:57 PM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean 8500 Orange🍊 45.5mm 232.32.46.21.01.001

Omega Seamaster Planet Ocean 8500 Orange🍊 45.5mm 232.32.46.21.01.001

Omega - 232.32.46.21.01.001 · $4,500
This listing is for an Omega Seamaster Planet Ocean 8500, a watch with a 45.5mm case size.

  • Condition: Great
  • Case Diameter: 45.5mm
Posted at
May 16, 2026, 12:54 PM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean 8500 232.30.46.21.01.001 45.5mm

Omega Seamaster Planet Ocean 8500 232.30.46.21.01.001 45.5mm

Omega - 232.30.46.21.01.001 · $4,500
This Omega Seamaster Planet Ocean 8500 features a 45.5mm case size and is available for sale in excellent condition, complete with all original accessories.

  • Condition: Excellent condition
  • Size: 45.5mm diameter
  • Case material: unknown
Posted at
May 15, 2026, 2:44 PM
Active
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[wts] Omega Seamaster Planet Ocean GMT GoodPlanet 232.30.44.22.03.001 43.5mm

Omega Seamaster Planet Ocean GMT GoodPlanet 232.30.44.22.03.001 43.5mm

Omega - 232.30.44.22.03.001 · $4,900
This Omega Seamaster Planet Ocean GMT features a 43.5mm case and is available with its original boxes and papers.

  • Condition: Excellent
  • Case Diameter: 43.5mm
Posted at
May 15, 2026, 2:41 PM
Active
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[WTS] Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium – $4,695

Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium – $4,695

Omega - 232.92.42.21.03.001 · $4,695
  • Case material: titanium
  • Case size: 42mm
Posted at
May 15, 2026, 9:16 AM
Active
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[WTS] Omega Seamaster Planet Ocean 2200.51 – 45mm – Full Set – $3,995

Omega Seamaster Planet Ocean 2200.51 – 45mm – Full Set – $3,995

Omega - 2200.51 · $3,995
This Omega Seamaster Planet Ocean features a 45mm stainless steel case, black dial and bezel, Co-Axial Caliber 2500 automatic movement, and 600m water resistance. It is a great everyday diver with strong build quality and classic design.

  • Condition: Very clean overall with light wear consistent with age
  • Case size: 45mm diameter
  • Movement type: Co-Axial Caliber 2500
  • Water resistance depth: 600m
Posted at
May 15, 2026, 9:11 AM
Active
View listing on r/WatchExchange