Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Diamond / Black / Alligator

Reference 232.18.46.21.01.001

Omega Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Diamond / Black / Alligator

About this watch

The Omega Seamaster Planet Ocean 232.18.46.21.01.001 is a statement piece that combines craftsmanship, durability, and luxury in one timepiece. The 45.5mm stainless steel case feels solid and luxurious on the wrist, while the black dial with mixed indexes offers striking contrast and readability. The gem-set bezel adds opulence, making this watch perfect for both diving expeditions and formal events. At its core is the Omega Caliber 8500 movement, a marvel of engineering with a Co-Axial escapement that reduces friction and enhances accuracy. With a water resistance rating of 600 meters, this watch is designed for serious divers who demand precision and reliability. The alligator leather strap adds sophistication and comfort, while the deployment clasp ensures security. This timepiece is an investment in both style and reliability, perfect for those willing to invest in a piece of art that tells a story.
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MSRP: $19,500
Market Price: $7,392

Key Features

  • Omega Caliber 8500 movement with Co-Axial escapement
  • 600m water resistance rating
  • 45.5mm stainless steel case
  • Black dial with mixed indexes and gem-set bezel
  • Alligator leather strap with deployment clasp
  • Chronometer certification for precision timekeeping
  • Sapphire crystal for durability

Specifications

Brand
Omega
Family
Seamaster Planet Ocean
Model
Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Diamond / Black / Alligator
Reference
232.18.46.21.01.001
Movement
8500
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 45.5mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
600

Current Listings

[WTS] Omega Seamaster Planet Ocean 45.5mm 215.33.46.51.03.001 Blue Dial - $4,400

Omega Seamaster Planet Ocean 45.5mm 215.33.46.51.03.001 Blue Dial - $4,400

Omega - 215.33.46.51.03.001 · $4,400
This listing is for an Omega Seamaster Planet Ocean Chronograph 45.5mm with a blue ceramic dial. The watch comes in excellent condition and includes original Omega packaging, pictograms, master chronometer cards, operating instructions, and a blue alligator leather strap.

  • Condition: Excellent overall condition
  • Case Size: 45.5mm diameter
  • Water Resistance: not specified
  • Strap Material: blue alligator leather
Posted at
Jan 30, 2026, 2:20 PM
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[WTS] Omega Seamaster Planet Ocean “Oreo” 43.5mm

Omega Seamaster Planet Ocean “Oreo” 43.5mm

Omega - 215.33.44.22.01.001 · $6,395
Up for sale is my Omega Seamaster Planet Ocean GMT with the black/white 'Oreo' bezel, a great modern Planet Ocean with strong wrist presence but still very wearable.

  • Condition: Excellent
  • Case size: 43.5mm
  • Material: leather (strap)
  • Additional items: inner and outer boxes, papers, booklet
Posted at
Jan 29, 2026, 12:12 PM
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[WTS] Omega Seamaster Planet Ocean Titanium - 42mm - Set Under Warranty

Omega Seamaster Planet Ocean Titanium - 42mm - Set Under Warranty

Omega - 232.90.42.21.03.001 · $4,750
This Omega Seamaster Planet Ocean 600M in a titanium case and 42mm size features a robust yet lightweight design, with water resistance up to 2000 feet.

  • Condition: Excellent all-around condition
  • Case material: titanium
  • Bracelet material: titanium
  • Water resistance: 200m / 2000 feet
Posted at
Jan 28, 2026, 6:34 PM
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[WTS] Omega Seamaster Planet Ocean 600M – 43.5mm – $4,800

Omega Seamaster Planet Ocean 600M – 43.5mm – $4,800

Omega - 215.30.44.21.01.002 · $4,800
This Omega Seamaster Planet Ocean is a stainless steel watch featuring a black dial, orange accents, and a ceramic bezel. It has a water resistance of 600m and comes with a full bracelet.

  • Condition: Very good overall condition with light handling marks consistent with careful use.
  • Case Size: 43.5mm
  • Water Resistance: 600m / 2000ft
  • Movement: Co-Axial Master Chronometer (METAS)
Posted at
Jan 28, 2026, 5:52 PM
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[WTS] Omega Seamaster Planet Ocean 600M 232.30.42.21.01.003 | 2024 Full Set

Omega Seamaster Planet Ocean 600M 232.30.42.21.01.003 | 2024 Full Set

Omega - 232.30.42.21.01.003 · $3,750
A 2024 Omega Seamaster Planet Ocean 600M in great condition, with a mark on the crystal near the 9 o'clock marker.

  • Condition: Pre-Owned, Great Condition with minor mark on the crystal
  • Serial number: 310+ AMP
  • Service history: Unknown
  • Adjustment: +3 seconds per day
Posted at
Jan 27, 2026, 11:35 PM
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[WTS] 2025 Omega Seamaster Planet Ocean 600m Green Bezel 215.32.44.21.06.001 Full Set

2025 Omega Seamaster Planet Ocean 600m Green Bezel 215.32.44.21.06.001 Full Set

Omega - 215.32.44.21.06.001 · $5,600
This is an Omega Seamaster Planet Ocean 600m Green Bezel, featuring a stainless steel case with a diameter of 43.5mm.

  • Condition: very nice previously owned
  • Depth rating: 600m
  • Year: 2025
  • Bezel color: green
Posted at
Jan 27, 2026, 8:11 PM
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[WTS] Omega Seamaster Planet Ocean GMT “Oreo” – Ref. 215.30.44.22.01.001 – Full Set – Mint

Omega Seamaster Planet Ocean GMT “Oreo” – Ref. 215.30.44.22.01.001 – Full Set – Mint

Omega - 215.30.44.22.01.001 · $6,350
This Omega Seamaster Planet Ocean GMT 'Oreo' features a black dial and a black & white ceramic GMT bezel, set in a stainless steel case with a diameter of 43.5mm.

  • Condition: Mint overall condition with one minor scratch on the clasp
  • Case Size: 43.5mm
  • Case Material: Stainless steel
  • Dial Color: Black
Posted at
Jan 27, 2026, 6:32 PM
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[WTS] Omega Seamaster Planet Ocean - New generation with the Blue Ceramic Bezel - B&P

Omega Seamaster Planet Ocean - New generation with the Blue Ceramic Bezel - B&P

Omega - 217.30.42.21.01.002 · $7,600
This listing features a brand-new Omega Seamaster Planet Ocean with a blue ceramic bezel. The watch has been well-maintained and includes all original accessories, such as the box, papers, warranty cards, hang tag, extra links, and an insurance appraisal from the AD setting the replacement value at $9,200.

  • Condition: Pre-owned, minor marks on the clasp and some links, otherwise as new
  • Bracelet size: 7.1-inch (18 cm)
  • Warranty cards included: true
  • Insurance appraisal value: 9200
Posted at
Jan 27, 2026, 12:56 PM
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[WTS] Omega Seamaster Planet Ocean Chronograph full kit

Omega Seamaster Planet Ocean Chronograph full kit

Omega - 215.30.46.51.01.001 · $4,999
This is a 2023 model year Omega Seamaster Planet Ocean Chronograph, featuring 600M water resistance and various functions such as jump hour capabilities and chronograph functions. The watch has a 45.5mm diameter and comes in a full kit.

  • Condition: great shape with noticeable marks on bezel and bracelet wear
  • Water resistance: 600m
  • Diameter: 45.5mm
  • Warrenty: 18 months remaining
Posted at
Jan 25, 2026, 5:35 PM
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