Twenty years ago, Omega debuted its Seamaster Planet Ocean, a 600m dive watch that built off the immense legacy of the Seamaster 300 — already arguably the most legendary diver ever. Now, celebrating two decades of underwater robustness, the Swiss icon has brought us the fourth-gen version of the Planet Ocean, with some much-welcomed updates.
A Sharp New Direction
The 4th-generation Planet Ocean marks the most dramatic redesign in the collection’s history. The rounded case and helium escape valve that defined earlier iterations are left behind in favor of a more angular aesthetic. Omega looked back to the Seamaster 120 “Mayol” models from the ’80s and early ’90s for styling. The new 42mm case — matching the diameter on the 2005 original — drops nearly 2.3mm in thickness to just 13.79mm, achieved through a combination of a flat sapphire crystal and a solid Grade 5 titanium caseback.
Visually, the sharp, faceted lugs now flow seamlessly into the new three-link bracelet with polished and brushed links. There are also rubber strap versions available, in black or orange.
Technical Evolution
Perhaps the boldest change is ditching the HEV entirely. Instead, Omega borrowed technology from the Ultra Deep with a an inner titanium ring around the crystal that provides the structural integrity needed for 600m water resistance without any risk of helium buildup. Both functional and aesthetic, it echoes the decorative inner ring from the original 2005 model.
The dial retains the signature arrowhead hands and bold applied indices, but the Arabic numerals at 3, 6, 9, and 12 have been redesigned with an angular style that complements the sharper case. There’s no date window anymore — another nod to cleaner tool-watch aesthetics. All three colorways (black, blue, and orange) feature matte black dials with white or color-matched numerals.
Speaking of orange: after years of R&D, Omega finally cracked the code on orange ceramic. The signature PO color, present since day one, now appears in a vibrant new ceramic bezel that’s notably more challenging to produce than black or blue — hence the modest price premium on orange models.
The Movement Inside
Under that titanium caseback sits the Co-Axial Master Chronometer Calibre 8912, the same movement powering the Ultra Deep. With 60 hours of power reserve and METAS certification, it delivers Omega’s highest standard of precision and magnetic resistance up to 15,000 gauss.
Spec Sheet
Model: Seamaster Planet Ocean 600M (4th Generation)
Case Material: Stainless steel with Grade 5 titanium inner ring and caseback
Case Size: 42mm
Case Thickness: 13.79mm
Movement: Omega Co-Axial Master Chronometer Calibre 8912 automatic
Water Resistance: 600m
Bezel Options: Black, blue, or orange ceramic with white enamel or hybrid ceramic diving scale
Dial: Matte black with rhodium-plated or varnished Arabic numerals
Lume: Super-LumiNova
Bracelet/Strap: Three-link steel bracelet or rubber strap
Pricing & Availability
Part of the permanent collection, the new Planet Ocean collection is available now, with black and blue models starting at $8,600 on rubber and $9,200 on bracelet. Orange versions run $8,900 on strap (in either black or orange rubber) and $9,500 on bracelet.
Recap
Omega Seamaster Planet Ocean Gen4
Omega just dropped the fourth-generation Planet Ocean after 20 years, and it’s a serious departure — sharper case design, no helium valve, slimmer profile at 13.79mm, and finally that signature orange in proper ceramic.
