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.
Buy Now on Jomashop
This is an affiliate link

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 2500, 2209.50

Omega Seamaster Planet Ocean 2500, 2209.50

Omega - 2209.50 · $2,650
For sale is an Omega Seamaster Planet Ocean 2500 in excellent condition, running great and comes as watch only.

  • Condition: excellent
Posted at
Mar 27, 2026, 4:19 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2500, 2209.50

Omega Seamaster Planet Ocean 2500, 2209.50

Omega - Planet Ocean 2500, 2209.50
Posted at
Mar 27, 2026, 4:17 PM
Active
View listing on r/WatchExchange
[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 listing is for an Omega Seamaster Planet Ocean Chronograph, a high-end diving watch with chronograph functionality.

  • Case Size: 45.5mm diameter
Posted at
Mar 27, 2026, 1:16 PM
Active
View listing on r/WatchExchange
[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
A Seamaster Planet Ocean Chronograph with a 45.5mm case, this Omega watch features a chronograph function among other notable features.

  • Condition: Excellent condition
  • Case Size: 45.5mm
  • Set: Full set
Posted at
Mar 27, 2026, 1:14 PM
Active
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: Omega Seamaster Planet Ocean 8500, a full set available for sale.

  • Condition: great condition
  • Length: 45.5mm diameter
Posted at
Mar 27, 2026, 1:06 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2200.51 – 42mm – Full Set – $4,195

Omega Seamaster Planet Ocean 2200.51 – 42mm – Full Set – $4,195

Omega - 2200.51 · $4,195
The Omega Seamaster Planet Ocean is a great everyday diver featuring the Co-Axial movement in a 42mm case, with strong build quality and classic design.

  • Condition: Very clean overall with light wear consistent with age
  • Case size: 42mm diameter
  • Water resistance: 600m depth rating
  • Movement: Caliber 2500 (Co-Axial)
Posted at
Mar 27, 2026, 10:40 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium – $4,895

Omega Seamaster Planet Ocean 600M – 232.92.42.21.03.001 – 42mm Titanium – $4,895

Omega - 232.92.42.21.03.001 · $4,895
This Omega Seamaster Planet Ocean 600M is a 42mm titanium watch.

Posted at
Mar 27, 2026, 10:22 AM
Active
View listing on r/WatchExchange
[WTS] 42mm Omega Seamaster Planet Ocean 2201.50 with Paper & Extra

42mm Omega Seamaster Planet Ocean 2201.50 with Paper & Extra

Omega - 2201.50 · $2,999
The Omega Seamaster Planet Ocean ref 2201.50 is a high-end watch featuring a black aluminum bezel, 42mm case, and 20mm lugs. It's considered the best of Omega's PO lineup with a durable design.

  • Condition: Very good
  • Case size: 42mm diameter
  • Lug to lug length: 48mm
  • Bezel material: black aluminum
Posted at
Mar 25, 2026, 7:57 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 600M – 42mm Titanium – Box & Papers 2025

Omega Seamaster Planet Ocean 600M – 42mm Titanium – Box & Papers 2025

Omega - 232.90.42.21.03.001 · $5,350
This Omega Seamaster Planet Ocean 600M features a blue ceramic bezel and dial, titanium 42mm case and bracelet, with an Omega Calibre 8500 automatic chronometer and 600 meter water resistance.

  • Condition: Mint condition
  • Case material: Full titanium
  • Bracelet material: Titanium
  • Water resistance: 600 meter / 2000 feet
Posted at
Mar 25, 2026, 2:26 PM
Active
View listing on r/WatchExchange