Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel - Black / Black / Bracelet

Reference 217.30.42.21.01.001

Omega Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel - Black / Black / Bracelet

About this watch

The Omega Seamaster Planet Ocean 600M 42 mm 217.30.42.21.01.001 debuted in 2025. The watch features a 42 mm case in stainless steel with a combination of polished and brushed surfaces. It is fitted with a flat sapphire crystal with anti-reflective treatment on both sides, and water resistance is rated at 600 meters (60 bar). The screw-in case back is manufactured from grade 5 titanium and features the Omega seahorse emblem. The polished black ceramic bezel ring carries a diving scale in white enamel, while the inner ring is made of polished grade 5 titanium. The black dial has a matte finish and displays rhodium-plated hands and indexes filled with white Super-LumiNova. Four applied Arabic numerals complete the hour layout. A date window is not present on this model. Inside ticks the Omega Co-Axial Master Chronometer caliber 8912, certified by METAS. The movement operates at 3.5 Hz and has a power reserve of approximately 60 hours, using twin barrels mounted in series and a free-sprung balance with a silicon balance spring. The watch is fitted with a stainless steel bracelet featuring an extendable foldover rack-and-pusher clasp with an additional diver extension.

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Specifications

Brand

Omega

Family

Seamaster Planet Ocean

Model

Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel - Black / Black / Bracelet

Reference

217.30.42.21.01.001

Movement

8912

Movement Features

Hours, Minutes, Seconds
Chronometer, Co-Axial Escapement

Case

42mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

600

Current Listings

Omega Seamaster Planet Ocean 600m Summer Blue Edition - $5,499 Cheapest anywhere!

Omega - 215.30.40.20.03.002 · $5,499

The Omega Seamaster Planet Ocean 600m Summer Blue Edition features a Summer Blue gradient dial with a matching ceramic bezel and commemorative engraving of Poseidon on the caseback.

Condition: Used/Great condition
Size: 39.5mm diameter
Dial color: Summer Blue gradient
Case material: ceramic bezel

Posted at

Feb 7, 2026, 10:22 PM

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Omega Seamaster Planet Ocean 600 Fully Serviced

Omega - 2200.50.00 · $3,600

This Omega Seamaster Planet Ocean 600 features a black dial and 45.5mm case diameter, serviced by Omega in December 2025.

Condition: Mint condition
Case Diameter: 45.5mm
Bezel Condition: Scratch-free
Crystal Condition: Scratch-free

Posted at

Feb 7, 2026, 4:18 PM

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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 8500 is a high-end watch with a factory warranty valid through November 2027, making it a rare find in such great condition.

Condition: exceptional
Warranty Valid Until: NOV 2027

Posted at

Feb 7, 2026, 1:46 AM

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Omega Seamaster Planet Ocean 8500 Orange😍🍊 45.5mm 232.32.46.21.01.001

Omega - 232.32.46.21.01.001 · $4,500

Additional Details: Model: Omega Seamaster Planet Ocean 8500 45.5mm, a 42-45mm watch with various features such as date display and unidirectional rotating bezel.

Condition: great condition
Case Diameter: 45.5mm

Posted at

Feb 7, 2026, 1:26 AM

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Omega Seamaster Planet Ocean Chronograph 45.5mm 232.30.46.51.01.001

Omega - 232.30.46.51.01.001 · $4,500

A Omega Seamaster Planet Ocean Chronograph, featuring a 45.5mm case and various functions.

Condition: Excellent condition and full set
Case Size: 45.5mm diameter

Posted at

Feb 7, 2026, 1:25 AM

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Omega Seamaster Planet Ocean 600M 45.5mm $2,250

Omega - Seamaster Planet Ocean 600M · $2,250

Selling an Omega Seamaster Planet Ocean 600M with excellent timegraphers and little signs of use. It fits a 19cm wrist.

Condition: Excellent condition, freshly polished
Case Size: 45.5mm diameter
Wrist Size Fit: approximately 19cm
Shipping Origin: Singapore

Posted at

Feb 6, 2026, 9:44 PM

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Omega Seamaster Planet Ocean Chronograph 232.90.46.51.03.001 (2020) – Full Set – $5999

Omega - 232.90.46.51.03.001 · $5,999

This Omega Seamaster Planet Ocean Chronograph is a professional-grade dive watch featuring a 600m water resistance rating and an in-house automatic chronograph movement.

Condition: Clean condition, normal wear consistent with careful use
Water Resistance: 600m
Case Size: 45.5mm diameter
Movement: Omega Co-Axial Master Chronometer Caliber 9300 column-wheel chronograph movement

Posted at

Feb 6, 2026, 2:35 PM

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