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 2201.51 42mm - $2,790

Omega - 2201.51 · $2,790

Up for sale is my Omega Seamaster Planet Ocean 2201.51, a 42mm automatic watch with an Omega Calibre 2500 movement.

Condition: Very good condition
Case material: Steel
Bracelet type: Original Omega steel bracelet
Bezel insert: Aftermarket bezel insert currently installed, can install original upon request

Posted at

May 7, 2026, 9:50 PM

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Omega Seamaster Planet Ocean 44.5mm $2,599

Omega - 2900.51 · $2,599

The Omega Seamaster Planet Ocean is a full-size, luxury diver with robust construction and classic styling.

Condition: great pre-owned condition
Case diameter: 44.5mm
Lug width: 22 mm
Water resistance depth rating: 600m

Posted at

May 7, 2026, 2:18 PM

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Omega Seamaster Planet Ocean 'Deep Black' Ceramic 46mm (215.92.46.22.01.001)

Omega - 215.92.46.22.01.001 · $5,900

A Omega Seamaster Planet Ocean 'Deep Black' Ceramic watch with a 46mm case size is being sold in good condition.

Condition: Good condition, minor wear on crystal
Case size: 46mm diameter
Depth rating: 600m water resistance

Posted at

May 7, 2026, 2:11 PM

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Omega Seamaster Planet Ocean 43.5MM Blue 215.30.44.21.03.001 - Box and Ebay Authentication Card - $4450

Omega - 215.30.44.21.03.001 · $4,450

The Omega Seamaster Planet Ocean is a stainless steel watch with a blue ZrO₂ ceramic dial, powered by the Caliber 8900 Co-Axial Master Chronometer movement. It has a 43.5mm case diameter, a ceramic bezel, and a water resistance rating of 600m/2000ft.

Condition: Excellent overall, with light surface wear and minor hairlines
Depth rating: 600m
Movement: Caliber 8900 Co-Axial Master Chronometer
Water resistance: 2000ft

Posted at

May 7, 2026, 7:35 AM

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[US] Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 232.30.46.21.01.001 - Full Set

Omega - 232.30.46.21.01.001 · $4,425

This Omega Seamaster Planet Ocean features a black dial and measures 45.5mm in diameter.

Condition: Fantastic condition with minor hairlines on case, clasp, or bracelet
Case diameter: 45.5mm
Water resistance: 600m

Posted at

May 7, 2026, 6:33 AM

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Omega Seamaster Planet Ocean 2201.50 42mm - $2,650 - US BASED!

Omega - Planet Ocean 2201.50 · $2,650

Up for sale is my Omega Seamaster Planet Ocean 2201.50 in great condition for its age, measuring at 42mm with an automatic Omega Calibre 2500 movement.

Condition: Very good condition with minimal marks/hairlines on case, caseback, and bracelet
Movement: Omega Calibre 2500
Case size: 42mm
Bracelet type: Original Omega steel bracelet

Posted at

May 5, 2026, 10:12 PM

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Omega / Seamaster Planet Ocean / 45.5mm / Full Set

Omega - 232.30.46.21.01.003 · $3,950

This Omega Seamaster Planet Ocean is a high-end watch featuring a 45.5mm case, full set with box and papers, and includes extra links for adjustability.

Condition: Excellent
Case Size: 45.5mm

Posted at

May 5, 2026, 3:09 PM

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View listing on r/WatchExchange