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

[WTS] Omega Seamaster Planet Ocean 600m 2201.51 42mm - $2,690

Omega Seamaster Planet Ocean 600m 2201.51 42mm - $2,690

Omega - 2201.51 · $2,690
Up for sale is my Omega Seamaster Planet Ocean 2201.51, a great condition watch with an automatic movement and measuring at 42mm.

  • Condition: great condition for its age with minimal marks/hairlines on case, caseback, and bracelet
  • Movement: Omega Calibre 2500
  • Water Resistance: 600m
Posted at
Mar 15, 2026, 9:39 PM
Active
View listing on r/WatchExchange
[WTS][US] Omega Seamaster Planet Ocean 600m - Black Dial - 45.5mm - 215.30.46.51.01.001 - Full Set

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

Omega - 215.30.46.51.01.001 · $6,625
This Omega Seamaster Planet Ocean features a black dial and measures 45.5mm in diameter.

  • Condition: Fantastic with minor hairlines
  • Case Size: 45.5mm diameter
  • Depth Rating: 600m
Posted at
Mar 15, 2026, 10:27 AM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean 8500 45.5mm 232.30.46.21.01.003 under warranty

Omega Seamaster Planet Ocean 8500 45.5mm 232.30.46.21.01.003 under warranty

Omega - 232.30.46.21.01.003 · $4,500
The Omega Seamaster Planet Ocean 8500 is a high-end watch with exceptional condition and warranty until Nov 2027.

  • Condition: exceptional
  • Case Size: 45.5mm diameter
  • Warranty Valid Until: November 2027
Posted at
Mar 14, 2026, 4:24 PM
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View listing on r/WatchExchange
[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: Model: Omega Seamaster Planet Ocean 8500 45.5mm

  • Condition: great condition
  • Size: 45.5mm diameter
Posted at
Mar 14, 2026, 4:16 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
Posted at
Mar 14, 2026, 4:15 PM
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[wts] Omega Seamaster Planet Ocean 8500 Titanium 232.90.46.21.03.001 45.5mm

Omega Seamaster Planet Ocean 8500 Titanium 232.90.46.21.03.001 45.5mm

Omega - 232.90.46.21.03.001 · $4,600
This Omega Seamaster Planet Ocean features a titanium case and is part of the 8500 series.

  • Condition: Excellent
  • Case size: 45.5mm diameter
  • Warranty status: factory valid through MAY 2028
Posted at
Mar 14, 2026, 4:13 PM
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[WTS] Omega Seamaster Planet Ocean “Creamsicle” 215.30.44.21.04.001

Omega Seamaster Planet Ocean “Creamsicle” 215.30.44.21.04.001

Omega - 215.30.44.21.04.001 · $4,598
The Omega Seamaster Planet Ocean 600M 'Creamsicle' features a 43.5mm stainless steel case, crisp white lacquered dial, and a unique orange ceramic bezel.

  • Condition: Pre-owned with minor signs of wear
  • Case diameter: 43.5mm
  • Water resistance: 600m
Posted at
Mar 14, 2026, 1:47 PM
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[WTS] 2024 Omega Seamaster Planet Ocean Summer Blue 39.5mm 215.30.40.20.03.002 B+P

2024 Omega Seamaster Planet Ocean Summer Blue 39.5mm 215.30.40.20.03.002 B+P

Omega - 215.30.40.20.03.002 · $5,900
The Omega Seamaster Planet Ocean Summer Blue brings a fresh and vibrant twist to a serious dive watch, featuring Omega's striking Summer Blue dial and a clean stainless steel case on bracelet.

  • Condition: Excellent (96%)
  • Case material: Stainless Steel
  • Bezel material: Blue
  • Diameter: 39.5mm
Posted at
Mar 14, 2026, 11:06 AM
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2021 Omega Seamaster Planet Ocean �Oreo� GMT -215.30.44.22.01.001 - BPs + Extra

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
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