Seamaster Planet Ocean family · 10 references Omega

Seamaster Planet Ocean 2nd Gen

Name: Omega Seamaster Planet Ocean 2nd Gen
Brand: Omega
Availability: InStock

45.5mm Popular Model

Low $3,600

Median $4,100

High $4,600

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The second-generation Planet Ocean gives Omega’s broad-shouldered diver a movement worth turning it over for: the caliber 8500, visible through a sapphire caseback. It keeps the first generation’s arrow hands, bold numerals and scalloped bezel, but wears noticeably thicker—a difference that matters more on the wrist than in a specifications table.

Introduced in 2011, this generation moved beyond the earlier caliber 2500 with a twin-barrel movement and an independently adjustable hour hand, useful when crossing time zones. The black ceramic bezel is another distinguishing detail, giving the familiar design a different surface character from its aluminum-bezel predecessor. For the steel-bracelet, 45.5mm version, 232.30.46.21.01.001 is a useful reference to know. Give the case height as much thought as the diameter: the substantial caseback raises the watch on the wrist, so its fit is quite different from the slimmer first generation.

MovementAutomatic

Caliber8500

Case MaterialStainless Steel

Case Size45.5mm

Water Resistance600m

What owners love

The dial has real depth: the applied numerals and hour markers catch the light, while the broad hands remain easy to pick out. Owners also praise the strong lume, with the minute hand and bezel pip glowing a different color from the hour markers.
The 8500 gets praise for steady accuracy, and its independently adjustable hour hand is genuinely useful when changing time zones without disturbing the minutes. The display back is another pleasure: this generation lets you see the movement rather than hiding it behind a solid caseback.
The bezel action and substantial bracelet give it a satisfying, solid feel in daily use. Owners who enjoy its heft often describe that solidity as a big part of why they keep wearing it.

Common Criticisms

The 45.5mm steel version is heavy and notably thick, and the height can be more noticeable than the diameter. It sits proud of the wrist and can fight with tighter shirt cuffs.
The original bracelet clasp lacks convenient on-the-fly sizing adjustment. Owners sometimes struggle to get a fit that stays comfortable as their wrist changes through the day, despite the separate diver's extension.

Seamaster Planet Ocean 2nd Gen

What owners love

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