Ultimate Guide to Omega Seamaster Planet Ocean 2025 – WatchGuys
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Omega Releases New Update to the Omega Seamaster Planet Ocean

What the fourth-generation Planet Ocean changes, from case thickness to dial layout.

Robert A • Last Updated: November 25, 2025

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Omega Releases New Update to the Omega Seamaster Planet Ocean
New release Ref. 217.30.42.21.01

New Omega Seamaster Planet Ocean 2025

After 20 years, Omega has released an updated version of their iconic Seamaster Planet Ocean. This is great news for dive fans, as the fourth-generation is a fresh look, with a major improvement on the wearability of the watch.

In this blog, we will break down everything you need to know about this new Omega Seamaster Planet Ocean.

Omega Seamaster Planet Ocean ref. 217.30.42.21.01, fourth-generation dive watch
The fourth-generation Omega Seamaster Planet Ocean, ref. 217.30.42.21.01.

The new model Seamaster Planet Ocean (ref. 217.30.42.21.01) has a noticeably thinner and more angular look. While the case is still 42mm, it is now just 13.79mm thick, as compared to the 16mm thickness of the previous model. The flat sapphire crystal adds to the flat profile of the case.

The new thinness of the model is already a major improvement of the wearability of the Planet Ocean, but the case is made lighter by two-part construction of the outer case and titanium inner ring.


Case and water resistance

Visually, the case itself also has a much more modern shape with an angular design at the lugs. The helium escape valve, which used to dig into some wearers' wrists, has been removed, making the watch even more comfortable. However, the Planet Ocean still remains water-resistant up to 600m thanks to case design and the screw-down case back.


Dial and lume

The new Planet Ocean has a matte black dial, featuring large Arabic numerals at 6, 9, and 12 o’clock and their iconic broad-arrow hands. Notably, Omega has also removed the date window from the dial, giving it a cleaner lay-out. The hands and hour-markers are all coated in Super-LumiNova X1, with the hour hand and makers glowing blue while the minute hand and bezel dot glows green!

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Market value $8,600 to $9,500

Omega Seamaster Planet Ocean Market Value

Availability, colorways, and where the pricing lands.

Omega Seamaster Planet Ocean ref. 217.30.42.21.01, matte black dial and ceramic bezel
The Planet Ocean is offered in orange, black, and blue, on steel or rubber.

This update to the Planet Ocean is not limited edition and will be part of Omega’s core collection. It is now available at boutiques and authorized deals, with three colorways available (orange, black, and blue) and two bracelet options (stainless steel and rubber).

217.30.42.21.01 market price

Price range$8,600 to $9,500
OrangeMost expensive
Blue and blackCheapest

The price of these models are fairly affordable, ranging from $8,600 to $9,500. The orange variation is the most expensive, due to the color reportedly being harder to produce, while the blue and black variations are the cheapest.

Dive watch enthusiasts should have a fairly easy time getting their hands on this new model, as only limited edition models tend to have a waitlist. We expect to see this new update performing similarly to previous Omega Seamaster Planet Oceans.

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