Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 42 Mécanique 24 Sapphires / Short Strap

Reference 2912.50.48

Omega Seamaster Planet Ocean 600M Co-Axial 42 Mécanique 24 Sapphires / Short Strap

About this watch

The Omega Seamaster Planet Ocean 600M Co-Axial 42 (model number 2912.50.48) is a statement piece that exudes luxury and sophistication. Its blend of white gold and stainless steel creates a sumptuous feel, while the gem-set bezel adds an air of elegance. The stunning blue dial with mother-of-pearl finish is a true masterpiece, reflecting light beautifully and changing hues as you move it around. The mixed indexes and arrow hands enhance readability, ensuring that you can tell the time at a glance, even underwater. At the heart of this watch is the innovative Omega caliber 2500 movement, a co-axial version of the ETA 2892-A2, promising precision, reliability, and durability. With its impressive water resistance of 600 meters, this watch is perfect for both diving enthusiasts and those who appreciate high-end horology.

Buy Now on Jomashop

This is an affiliate link

Key Features

Omega Caliber 2500 Co-Axial Movement
600M Water Resistance
White Gold and Stainless Steel Case
Gem-Set Bezel
Blue Mother of Pearl Dial
Mixed Indexes and Arrow Hands
Sapphire Crystal

Specifications

Brand

Omega

Family

Seamaster Planet Ocean

Model

Seamaster Planet Ocean 600M Co-Axial 42 Mécanique 24 Sapphires / Short Strap

Reference

2912.50.48

Movement

2500

Movement Features

Hours, Minutes, Seconds
Date
Co-Axial Escapement, Chronometer

Case

42mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

600

Current Listings

2025 Omega Seamaster Planet Ocean 600m Titanium Blue 232.92.44.22.03.001 Full Set - $4,995

Omega - 232.92.44.22.03.001 · $4,995

Up for sale is a Omega Seamaster Planet Ocean 600m Titanium Blue, a watch that features a 2025 model year and has been thoroughly tested on a timegrapher.

Condition: Excellent condition with minimal signs of wear
Year: 2025
Case material: Titanium
Water resistance: 600m

Posted at

Apr 30, 2026, 9:54 AM

Active

View listing on r/WatchExchange

[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 · $4,450

This Omega Seamaster Planet Ocean is a 45.5mm watch with a black dial and features a depth rating of 600m.

Condition: Fantastic with minor hairlines on case, clasp, or bracelet
Case Diameter: 45.5mm
Water Resistance: 600m

Posted at

Apr 30, 2026, 7:37 AM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 600M – 42mm Titanium – Complete set

Omega - 232.90.42.21.03.001 · $4,950

This Omega Seamaster Planet Ocean 600M features a 42mm titanium case, blue ceramic bezel and dial, and an automatic chronometer movement with 600 meter water resistance.

Condition: Mint condition
Case material: Titanium
Bracelet material: Titanium
Water resistance: 2000 feet / 600 meters

Posted at

Apr 29, 2026, 11:07 AM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean GMT 43.5mm Black/Orange Dial | 2021 Full Set |232.32.44.22.01.002

Omega - 232.32.44.22.01.002 · $3,750

The Omega Seamaster Planet Ocean GMT features a 43.5mm case with a black and orange dial, including the GMT function.

Condition: Great condition
Case diameter: 43.5mm
Material: Black/Orange Dial

Posted at

Apr 29, 2026, 12:14 AM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 232.30.46.21.01.001 – 45.5mm – 2015 – Full Set

Omega - 232.30.46.21.01.001 · $3,950

This Omega Seamaster Planet Ocean 45.5mm is a bold dive watch with strong wrist presence and Omega’s proven Co-Axial movement, built for durability and performance.

Condition: Good overall condition
Case size: 45.5mm
Movement type: Omega Co-Axial automatic
Crystal material: Sapphire crystal

Posted at

Apr 28, 2026, 12:46 PM

Active

View listing on r/WatchExchange

Omega Seamaster Planet Ocean 232.30.42 42mm Box and Papers - $3,650 - Reserved Post for u/Confident_Wallaby611

Omega - 232.30.42 · $3,650

A pre-owned Omega Seamaster Planet Ocean in excellent condition, with a steel case and original bracelet.

Condition: Pre-owned in great condition with minimal marks/hairlines
Case size: 42mm diameter
Bracelet type: original Omega steel
Box and papers included: yes

Posted at

Apr 27, 2026, 10:10 PM

Active

View listing on r/WatchExchange

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

Omega - 2201.50 · $2,650

Up for sale is my Omega Seamaster Planet Ocean 2201.50, a 42mm watch with an automatic Omega Calibre 2500 movement.

Condition: Very good condition with minimal marks/hairlines and light marks on bezel insert
Case size: 42mm diameter
Movement type: Automatic
Bracelet material: Steel

Posted at

Apr 27, 2026, 9:21 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

Omega SEAMASTER PLANET OCEAN 600M STEEL SUMMER BLUE DIAL 39.5MM 2024 FULL SET

Omega - 215.30.40.20.03.002 · $5,175

This is a 2024 Omega Seamaster Planet Ocean 600m in stainless steel with a blue ceramic bezel and brushed ceramic blue gradient dial.

Condition: Excellent, unpolished condition
Movement: Co-Axial Master Chronometer calibre 8900
Water resistance: 600m
Diameter: 39.5mm

Posted at

Apr 3, 2025, 9:35 PM

Active

View listing on RolexForums