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 Diver, XL 45.5MM, Automatic Black Dial, SS Bracelet 2200.50

OMEGA Seamaster Planet Ocean Diver, XL 45.5MM, Automatic Black Dial, SS Bracelet 2200.50

OMEGA - 2200.50 · $3,800
The OMEGA Seamaster Planet Ocean is a serious diver with a 45.5mm steel presence, black dial, and 600 meters of water resistance.

  • Condition: preowned with minor flaws (swirls on dial)
  • Bracelet material: SS
  • Water resistance: 600m
Posted at
Oct 21, 2025, 4:00 PM
Active
View listing on r/WatchExchange
[WTS] OMEGA Seamaster Planet Ocean 600M

OMEGA Seamaster Planet Ocean 600M

OMEGA - Seamaster Planet Ocean 600M · $4,400
A brand new Omega Seamaster Planet Ocean 600M purchased from an Authorized Dealer in 2021, serviced by Omega in 2023 and showing normal light wear.

  • Condition: Excellent condition, lightly worn from desk use
  • Purchase Year: 2021
  • Serviced By: Omega
  • Bezel Replaced: due to slight looseness
Posted at
Oct 21, 2025, 2:31 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean

Omega Seamaster Planet Ocean

Omega - Planet Ocean · $7,000
Posted at
Oct 20, 2025, 1:46 PM
Active
View listing on r/WatchExchange
[WTS][WTT] Omega Seamaster Planet Ocean 600M - Skyfall Limited Edition - Serviced

[WTT] Omega Seamaster Planet Ocean 600M - Skyfall Limited Edition - Serviced

Omega - 232.30.42.21.01.004 · $4,999
The Omega Seamaster Planet Ocean 600M is a limited edition Skyfall watch with unique features such as Easter eggs and a handsome black dial. It's a supremely legible watch with a robust movement and impressive water resistance.

  • Condition: Excellent, serviced by Omega in August
  • Movement: In-house caliber 8507b, silicon balance spring
  • Water Resistance: 600m (~2000 feet)
  • Size: 42mm diameter
Posted at
Oct 19, 2025, 1:00 PM
Active
View listing on r/WatchExchange
[WTS] (Serviced) Omega Seamaster Planet Ocean 600mm Black 232.30.46.21.01.003 45.5mm $2900

(Serviced) Omega Seamaster Planet Ocean 600mm Black 232.30.46.21.01.003 45.5mm $2900

Omega - 232.30.46.21.01.003 · $2,900
Planet Ocean model with a black face, 45.5mm case size, and excellent timegrapher numbers.

  • Condition: Excellent
  • Case Size: 45.5mm
Posted at
Oct 18, 2025, 1:32 AM
Active
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[wts] NEAR MINT Omega Seamaster Planet Ocean 8500 Orange 45mm 232.32.46.21.01.003 on new style OEM mesh bracelet

NEAR MINT Omega Seamaster Planet Ocean 8500 Orange 45mm 232.32.46.21.01.003 on new style OEM mesh bracelet

Omega - 232.32.46.21.01.003 · $3,600
A near-mint Omega Seamaster Planet Ocean Orange 8500 in 45mm, featuring a gray bezel swapped for an OEM orange one and a new style OEM mesh/milanese bracelet.

  • Condition: Near mint
  • Bracelet Type: Mesh/Milanese
  • Bezel Color: Orange
Posted at
Oct 17, 2025, 9:24 PM
Active
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[wts] Omega Seamaster Planet Ocean GMT Good Planet 232.30.44.22.03.001 3.5mm

Omega Seamaster Planet Ocean GMT Good Planet 232.30.44.22.03.001 3.5mm

Omega - 232.30.44.22.03.001 · $4,900
A Omega Seamaster Planet Ocean GMT Good Planet, featuring a 43.5mm case size.

  • Condition: Good
  • Case Diameter: 43.5mm
Posted at
Oct 17, 2025, 9:21 PM
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[wts] Omega Seamaster Planet Ocean Chronograph 9300 232.30.46.51.01.001 under warranty

Omega Seamaster Planet Ocean Chronograph 9300 232.30.46.51.01.001 under warranty

Omega - 9300 232.30.46.51.01.001 · $4,400
This Omega Seamaster Planet Ocean Chronograph is a well-maintained timepiece with factory warranty valid through NOV 2027.

  • Condition: Great condition with boxes and papers
Posted at
Oct 17, 2025, 9:01 PM
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[WTS] Omega Seamaster Planet Ocean 600M - 43.5mm - Black Dial - Boxes & Papers

Omega Seamaster Planet Ocean 600M - 43.5mm - Black Dial - Boxes & Papers

Omega - 232.32.44.22.01.001 · $4,999
This Omega Seamaster Planet Ocean 600M features a black dial and comes in at 43.5mm in size. It has clean crystal with no hairlines on the case.

  • Condition: great condition with clean crystal and no hairlines
  • Case Size: 43.5mm
  • Water Resistance: 600m
Posted at
Oct 17, 2025, 1:17 AM
Active
View listing on r/WatchExchange