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 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
This Omega Seamaster Planet Ocean 8500 is a high-end diver's watch featuring a 45.5mm case size and available under warranty until November 2027.

  • Condition: exceptional condition
  • Case Size: 45.5mm
Posted at
Dec 20, 2025, 9:15 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
This Omega Seamaster Planet Ocean Chronograph is a 45.5mm model with various features.

  • Condition: Excellent
  • Diameter: 45.5mm
Posted at
Dec 20, 2025, 8:19 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
This Omega Seamaster Planet Ocean features a 45.5mm case and is available with full set.

  • Condition: great condition
  • Case diameter: 45.5mm
Posted at
Dec 20, 2025, 8:16 PM
Active
View listing on r/WatchExchange
[wts] Omega Seamaster Planet Ocean 2500 42.5mm 2209.50.00

Omega Seamaster Planet Ocean 2500 42.5mm 2209.50.00

Omega - 2209.50.00 · $3,400
A 42.5mm Omega Seamaster Planet Ocean 2500 is being sold in excellent condition with its original boxes and papers.

  • Condition: Great condition
  • Case size: 42.5mm
Posted at
Dec 20, 2025, 8:13 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean “Creamsicle” - 215.30.44.21.04.001 - Travel box and papers

Omega Seamaster Planet Ocean “Creamsicle” - 215.30.44.21.04.001 - Travel box and papers

Omega - 215.30.44.21.04.001 · $4,798
The Omega Seamaster Planet Ocean 600M “Creamisicle” delivers all of the performance of Omega’s dive watch heritage highlighted by a signature eye-catching orange bezel.

  • Condition: Great pre-owned condition with minor signs of wear
  • Case size: 43.5mm
  • Depth rating: 600m (60 bar/2,000 feet)
  • Movement: Omega Master Chronometer calibre 8900 self-winding mechanical movement
Posted at
Dec 19, 2025, 5:03 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 2201.50

Omega Seamaster Planet Ocean 2201.50

Omega - Planet Ocean 2201.50 · $3,750
The Omega Seamaster Planet Ocean is a 42mm watch purchased through Chrono24 from a reputable seller in Japan, sold with original box and accessories.

  • Condition: 8.9/10
  • Size: 42mm diameter
  • Last service date: unknown
Posted at
Dec 18, 2025, 5:11 AM
Active
View listing on r/WatchExchange
[WTS] OMEGA SEAMASTER PLANET OCEAN 600M (2025 Model) Brand New, Unworn. 217.32.42.21.01.002. New Model

OMEGA SEAMASTER PLANET OCEAN 600M (2025 Model) Brand New, Unworn. 217.32.42.21.01.002. New Model

Omega - 217.32.42.21.01.002 · $7,850
A 2025 Omega Seamaster Planet Ocean 600M in its full set with sticker, tag, box and December 2025 card date.

  • Condition: Brand new
  • Year: 2025
  • Depth rating: 600m
Posted at
Dec 17, 2025, 11:16 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean (Black) 39.5mm - 215.30.40.20.01.001

Omega Seamaster Planet Ocean (Black) 39.5mm - 215.30.40.20.01.001

Omega - 215.30.40.20.01.001
Posted at
Dec 17, 2025, 3:36 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Planet Ocean 215.32.43.21.04.001 America's Cup Full Set!

Omega Seamaster Planet Ocean 215.32.43.21.04.001 America's Cup Full Set!

Omega - 215.32.43.21.04.001 · $6,500
This Omega Seamaster Planet Ocean is a special edition commemorating the brand's participation as official timekeeper for the America's Cup, featuring a stunning white dial and red/blue accents.

  • Set: complete
  • Included items: watch,box,operations manual,pictogram,chronograph,warranty cards
  • Shipping: overnight, fully insured with signature required
Posted at
Dec 17, 2025, 8:29 AM
Active
View listing on r/WatchExchange