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

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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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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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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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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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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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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OMEGA SEAMASTER PLANET OCEAN 600M 44MM GREY DIAL - 215.32.44.21.01.002 - BOX & PAPERS - EXCELLENT CONDITION

OMEGA - 215.32.44.21.01.002 · $6,271

This Omega Seamaster Planet Ocean 600M features a sleek grey dial and bezel, with 600m water resistance and OMG's M@ster Chr0nometer movement.

Condition: Excellent
Case size: 44mm diameter
Water resistance: 600m depth rating
Movement: Automatic

Posted at

Jan 25, 2026, 12:51 PM

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[WTT] Omega Seamaster Planet Ocean 600M - Skyfall Limited Edition - w/ Omega Service Price Drop

Omega - 232.30.42.21.01.004 · $4,750

This limited edition Skyfall Omega Seamaster Planet Ocean 600M is one of just over 5,000 numbered pieces, featuring a handsome black patterned dial and a 42mm case size. The watch boasts an in-house caliber 8507b movement with increased anti-magnetic properties and a water resistance of 600 meters.

Condition: Excellent, serviced by Omega in August
Case Size: 42mm
Water Resistance: 600m (~2000ft)
Movement: Omega Calibre 8507b

Posted at

Jan 25, 2026, 12:01 PM

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