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.
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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

[WTS] 2017 Omega Seamaster Planet Ocean 600m 45.5mm 232.30.46.21.01.002 | FRESH SERVICE!

2017 Omega Seamaster Planet Ocean 600m 45.5mm 232.30.46.21.01.002 | FRESH SERVICE!

Omega - 232.30.46.21.01.002 · $3,250
A 2017 Omega Seamaster Planet Ocean 600m in excellent condition, recently serviced and running great.

  • Year: 2017
  • Case size: 45.5mm
  • Water resistance: 600m
Posted at
Feb 25, 2026, 5:19 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M 232.30.42.21.01.003 | 2024 Full Set

Omega Seamaster Planet Ocean 600M 232.30.42.21.01.003 | 2024 Full Set

Omega - 232.30.42.21.01.003 · $3,750
The seller is listing a 2024 Omega Seamaster Planet Ocean 600M, a 42mm watch in excellent condition with some minor cosmetic imperfections.

  • Condition: Pre-Owned
  • Case size: 42mm
  • Water resistance: 600m
  • Service history: Unknown
Posted at
Feb 24, 2026, 9:40 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean GMT “Oreo” 215.30.44.22.01.001 — Full Set

Omega Seamaster Planet Ocean GMT “Oreo” 215.30.44.22.01.001 — Full Set

Omega - 215.30.44.22.01.001 · $6,995
The Omega Seamaster Planet Ocean GMT “Oreo” is a modern 43.5mm watch with a black/white bezel and METAS Master Chronometer certification.

  • Condition: Excellent overall condition
  • Case Size: 43.5mm
  • Case Material: Stainless steel
  • Bezel Type: Black/White timing bezel
Posted at
Feb 24, 2026, 6:59 PM
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View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2201.50 42mm Full Kit - $3,250

Omega Seamaster Planet Ocean 2201.50 42mm Full Kit - $3,250

Omega - 2201.50 · $3,250
The Omega Seamaster Planet Ocean 2201.50 is a 42mm automatic watch with an Omega Calibre 2500 movement, available as a full kit including double box and triple cards.

  • Condition: Very good condition with minimal marks/hairlines on the case, caseback, and bracelet.
  • Case size: 42mm diameter
  • Movement: automatic Omega Calibre 2500
  • Bracelet material: steel
Posted at
Feb 23, 2026, 9:19 PM
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[WTS] 2020 Omega Seamaster Planet Ocean Black Dial with Orange Bezel on Bracelet 215.30.44.21.01.002 B+P

2020 Omega Seamaster Planet Ocean Black Dial with Orange Bezel on Bracelet 215.30.44.21.01.002 B+P

Omega - 215.30.44.21.01.002 · $4,700
This 2020 Omega Seamaster Planet Ocean is a rugged yet refined dive watch, featuring a sharp black dial and matching black and orange ceramic bezel. It offers serious durability along with Omega’s reliable in-house movement for everyday performance you can count on.

  • Condition: Good condition, some signs of wear on clasp, bracelet, case, and bezel
  • Case diameter: 43.5mm
  • Crystal: Sapphire crystal
  • Bracelet material: Stainless Steel
Posted at
Feb 23, 2026, 1:09 PM
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[WTS] BNIB Omega Seamaster Planet Ocean

BNIB Omega Seamaster Planet Ocean

Omega - 217.30.42.21.01.002 · $8,075
A brand new stickered, unworn Omega Seamaster Planet Ocean with black dial and blue bezel combination on the bracelet.

  • Condition: Brand new in box (BNIB)
  • Movement type: Mechanical
  • Dial color: Black
  • Bezel color: Blue
Posted at
Feb 22, 2026, 4:25 PM
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[WTS] Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

Omega - 215.30.46.51.01.001 · $6,700
An Omega Seamaster Planet Ocean 600m with a black dial and 45.5mm case, featuring mechanical functionality without issues.

  • Condition: Fantastic with minor hairlines
  • Case Diameter: 45.5mm
  • Water Resistance: 600m
Posted at
Feb 22, 2026, 12:22 PM
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[WTS] Omega Seamaster Planet ocean 600M Black Dial 45.5MM Diver 232.30.46.21.01.001 - $4000

Omega Seamaster Planet ocean 600M Black Dial 45.5MM Diver 232.30.46.21.01.001 - $4000

Omega - 232.30.46.21.01.001 · $4,000
The Omega Seamaster Planet Ocean 600M is a black dial diver's watch with a scratch-resistant sapphire crystal and a stainless steel case on a bracelet.

  • Condition: Excellent
  • Case size: 45.5mm diameter
  • Water resistance: 2000 feet / 60 bar
  • Depth rating: 600m
Posted at
Feb 20, 2026, 12:23 PM
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[WTS] Omega Seamaster Planet Ocean (217.30.42.21.01.001)

Omega Seamaster Planet Ocean (217.30.42.21.01.001)

Omega - 217.30.42.21.01.001 · $6,250
Up for sale is a good condition Omega Seamaster Professional Planet Ocean, working great with an amplitude over 290 and no beat error running at +1 spd.

  • Condition: Good condition, desk diver (with signs of use)
  • Calibre: 8912
  • Size: 42mm diameter
  • Material: Stainless / Titanium
Posted at
Feb 20, 2026, 11:38 AM
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View listing on r/WatchExchange