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.

Buy Now on Jomashop

This is an affiliate link

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 45mm 232.30.46.21.01.001 - $3200

Omega - 232.30.46.21.01.001 · $3,200

A Omega Seamaster Planet Ocean 45mm is for sale with its original packaging and accessories.

Condition: Some hairline scratches on the case, small knick on lug, signs of wear on bracelet
Box And Papers: Yes, including outer/inner boxes, instruction manual, warranty card, original accessories
Shipping: Via FedEx Ground with signature confirmation
Payment Methods: Zelle preferred, PayPal G&S available, banks wire

Posted at

Dec 7, 2025, 12:04 PM

Active

View listing on r/WatchExchange

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

Omega - 232.30.42.21.01.004 · $4,900

A discontinued Limited Edition Skyfall Omega Seamaster Planet Ocean 600M with a black patterned dial and in-house caliber 8507b movement, water resistant up to 600 meters.

Condition: Pre-owned, recently serviced by Omega
Case size: 42mm
Water resistance: 600m (~2000ft)
Movement: Caliber 8507b with silicon balance spring

Posted at

Dec 6, 2025, 1:47 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean Titanium 232.90.46.21.03.001 45.5mm under warranty dial😍😍

Omega - 232.90.46.21.03.001 · $4,600

This Omega Seamaster Planet Ocean Titanium is a 45.5mm watch under warranty, with a factory warranty valid until November 2027.

Condition: Excellent condition
Size: 45.5mm diameter
Water resistance: no specific value mentioned

Posted at

Dec 6, 2025, 12:25 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 8500 45.5mm 232.30.46.21.01.003 under warranty

Omega - 232.30.46.21.01.003 · $4,500

This Omega Seamaster Planet Ocean is a high-end diver's watch with a 45.5mm case, featuring a stainless steel construction and impressive water resistance.

Condition: exceptional condition
Warranty Valid Until: NOV 2027
Shipping Method: FedEx
Payment Methods: zelle, venmo, wire, applepay

Posted at

Dec 6, 2025, 12:10 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean Black 8900 43.5mm 215.30.44.21.01.001 under warranty

Omega - 215.30.44.21.01.001 · $4,600

A black Omega Seamaster Planet Ocean with a 43.5mm case, under warranty until AUG 2029.

Condition: Excellent
Warranty: valid through AUG 2029
Boxes and papers: included

Posted at

Dec 6, 2025, 12:08 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 215.32.43.21.04.001 America's Cup Full Set!

Omega - 215.32.43.21.04.001 · $6,500

This Omega Seamaster Planet Ocean is a special edition commemorating Omega's participation in the America's Cup, featuring a white dial with red and blue accents.

Set: Complete set with watch, box, operations manual, pictogram, chronograph, and warranty cards
Shipping: Overnight shipping, fully insured, signature required

Posted at

Dec 6, 2025, 10:36 AM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean Chronograph 600m 2900.50.81

Omega - 2900.50.81 · $2,299

This Omega Seamaster Planet Ocean Chronograph is a 45.5mm watch that features a red Barton strap and has been previously worn.

Condition: Pre-owned, scratches on AR coating
Case size: 45.5mm
Depth rating: 600m

Posted at

Dec 4, 2025, 1:51 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 600m Orange 2209.50 42mm

Omega - 2209.50 · $2,650

This Omega Seamaster Planet Ocean 600m is a high-end dive watch with impressive features.

Size: 42mm diameter
Depth Rating: 600m

Posted at

Dec 3, 2025, 7:43 PM

Active

View listing on r/WatchExchange

2021 Omega Seamaster Planet Ocean �Oreo� GMT -215.30.44.22.01.001 - BPs + Extra

Omega - 215.30.44.22.01.001 · $5,700

2021 Omega Seamaster Planet Ocean 'Oreo' GMT is a luxury watch with minor wear on the case.

Condition: Very Good Condition
Case Wear: Minor
Box Condition: Outer white box flap is loose
Accessories: Double Box,All 3 Omega Cards (Warranty dated 6/8/21),Hangtag, Manual, Customer Service papers,Extra Black/white Rubber Strap

Posted at

Apr 4, 2025, 3:36 PM

Active

View listing on RolexForums