Omega Seamaster Planet Ocean Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Black / Alligator

Reference 2900.50.37

Omega Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Black / Alligator

About this watch

The Omega Seamaster Planet Ocean 2900.50.37 is a luxury watch that embodies style, functionality, and adventure. Founded in 1848, Omega has established itself as a titan in the watch industry, known for precision, quality, and innovative technology. This timepiece features the Omega Caliber 2500 movement, a co-axial version of the ETA 2892-A2 designed to enhance accuracy and reduce friction. The black dial, adorned with luminous markers and hands, ensures readability in any environment. The watch's robust stainless steel case is comfortable on the wrist, while the sapphire crystal protects the dial from scratches and impacts. With a water resistance of 600 meters, it's built for serious divers but doesn't shy away from elegance. The Seamaster Planet Ocean 2900.50.37 is a true embodiment of the brand's dedication to excellence, blending ruggedness and elegance in its design.
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MSRP: $4,200
Market Price: $3,536

Key Features

  • Omega Caliber 2500 movement
  • 600m water resistance
  • Sapphire crystal glass
  • 45.5mm stainless steel case
  • Rotating bezel with 0-60 markings
  • Black dial with luminous markers and hands
  • 48-hour power reserve

Specifications

Brand
Omega
Family
Seamaster Planet Ocean
Model
Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Black / Alligator
Reference
2900.50.37
Movement
2500
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Co-Axial Escapement, Chronometer
Case
Stainless Steel 45.5mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
600

Current Listings

[WTS] Omega Seamaster Planet Ocean 2201.51 42mm Box and Card - $2,850

Omega Seamaster Planet Ocean 2201.51 42mm Box and Card - $2,850

Omega - 2201.51 · $2,850
The Omega Seamaster Planet Ocean 2201.51 is an automatic watch with a 42mm steel case, on original Omega steel bracelet.

  • Condition: Very good condition, minimal marks/hairlines
  • Case size: 42mm
  • Bracelet length range: 7-7.25 inches
Posted at
Apr 21, 2026, 4:08 AM
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[WTS] Omega Seamaster Planet Ocean 600M – 42mm Titanium – Complete set

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 blue ceramic bezel and dial, titanium case, and bracelet, with an Omega Calibre 8500 automatic chronometer.

  • Condition: Mint
  • Case size: 42mm diameter
  • Bracelet material: titanium
  • Water resistance: 600m / 2000ft
Posted at
Apr 20, 2026, 11:18 AM
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[wts] Omega Seamaster Planet Ocean 8500 Orange 45.5mm 232.32.46.21.01.003 on Omega mesh bracelet

Omega Seamaster Planet Ocean 8500 Orange 45.5mm 232.32.46.21.01.003 on Omega mesh bracelet

Omega - 232.32.46.21.01.003 · $3,600
This Omega Seamaster Planet Ocean Orange 8500 features a gray bezel that was swapped for an OEM orange one, and comes with a new style mesh/milanese bracelet.

  • Condition: Near mint
  • Bracelet type: OEM mesh/milanese
  • Bezel color: orange
  • Original strap color: black
Posted at
Apr 18, 2026, 10:58 PM
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[wts] Omega Seamaster Planet Ocean Chronograph 9300 Orange 45.5mm 232.32.46.51.01.001

Omega Seamaster Planet Ocean Chronograph 9300 Orange 45.5mm 232.32.46.51.01.001

Omega - 232.32.46.51.01.001 · $4,500
This Omega Seamaster Planet Ocean Chronograph features a 45.5mm diameter case, an orange strap that was swapped for black, and comes with boxes and warranty.

  • Case Size: 45.5mm
  • Strap Color: black (previously orange)
  • Includes: boxes,warranty
Posted at
Apr 18, 2026, 10:56 PM
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[wts] Omega Seamaster Planet Ocean 8500 Orange😍🍊 45.5mm 232.32.46.21.01.001

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: Omega Seamaster Planet Ocean 8500 with a 45.5mm diameter.

  • Condition: great condition
  • Diameter: 45.5mm
Posted at
Apr 18, 2026, 10:47 PM
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[wts] Omega Seamaster Planet Ocean Chronograph 45.5mm 232.30.46.51.01.001

Omega Seamaster Planet Ocean Chronograph 45.5mm 232.30.46.51.01.001

Omega - 232.30.46.51.01.001 · $4,500
This Omega Seamaster Planet Ocean Chronograph is a 45.5mm watch with additional details not specified in the description.

  • Condition: Excellent condition and full set
  • Case size: 45.5mm diameter
Posted at
Apr 18, 2026, 10:42 PM
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[wts] Omega Seamaster Planet Ocean 8900 Blue 43.5mm 215.30.44.21.03.001 under warranty

Omega Seamaster Planet Ocean 8900 Blue 43.5mm 215.30.44.21.03.001 under warranty

Omega - 215.30.44.21.03.001 · $4,600
This Omega Seamaster Planet Ocean is a 43.5mm watch with blue dial, under warranty through September 2028.

  • Case size: 43.5mm diameter
  • Water resistance: 300m depth rating
Posted at
Apr 18, 2026, 5:30 PM
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[wts] Omega Seamaster Planet Ocean 8900 Blue 43.5mm 215.30.44.21.03.001 underwarranty

Omega Seamaster Planet Ocean 8900 Blue 43.5mm 215.30.44.21.03.001 underwarranty

Omega - 215.30.44.21.03.001 · $4,600
This Omega Seamaster Planet Ocean 8900 Blue is a 43.5mm watch with factory warranty valid through November 2028.

  • Condition: Like new (with boxes in great condition)
  • Case Size: 43.5mm
Posted at
Apr 18, 2026, 5:28 PM
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[wts] RARE Omega Seamaster Planet Ocean 2500D 45.5mm 2200.50.00

RARE Omega Seamaster Planet Ocean 2500D 45.5mm 2200.50.00

Omega - 2200.50.00 · $3,900
A rare Omega Seamaster Planet Ocean 2500D, featuring a large 45.5mm case size and excellent condition. The watch comes with its original boxes and warranty.

  • Condition: Excellent
  • Size: 45.5mm diameter
  • Case condition: Excellent
Posted at
Apr 18, 2026, 5:24 PM
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