Side by side

Seestern S450 Ocean StarvsSeiko 5 Sports SKX series

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
5 Sports SKX series
Seiko5 Sports SKX series
MSRP $350

At a glance

11 of 29 specs differ
Diameter
S450 Ocean Star40mm
5 Sports SKX series38mm
Power Reserve
S450 Ocean Star41h
5 Sports SKX series41h
Water Resistance
S450 Ocean Star100m
5 Sports SKX series100m
MSRP
S450 Ocean Star$299
5 Sports SKX series$350

Full specifications

Case

4 specs
Diameter
40mm
38mm
Thickness
12mm
12.1mm
Lug-to-Lug
48mm
44.2mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
White
Black
Lume
Tritium
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
TMI NH35A
4R36
Beat Rate
21,600 vph
28,800 vph
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$350

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seestern S450 Ocean Star

Owners widely praise the Seestern S450 Ocean Star's Yachtmaster-style case and flawless bracelet finishing, with one owner noting the ST2130 movement keeps good time. The bezel action is described as having individual notches but feeling like a friction bezel, while another owner flags the bezel and crown action as smooth with perfect alignment. Lume is a point of contention, with one source describing it as a nice cool blue with ice-white application, while others note it as weak or not matching Prospex standards, despite using BGW-9. The watch is considered a "big boy" ideal for larger wrists (19cm+), potentially too large for 17cm wrists due to its size and non-tapering bracelet. Overall, owners rate the Seestern S450 Ocean Star highly for its build quality and finishing at the price point, despite some reservations about its size and lume intensity.

Seiko 5 Sports SKX series

The Seiko 5 Sports SKX series is widely praised for its value, robust build, and powerful lume, with owners appreciating its comfortable bracelets and improved movement featuring hacking and hand-winding. Some owners find the original SKX models heavy and bulky, while others praise their ruggedness and iconic dive watch design. Reviewers note the 38mm models offer great value at around €350 and are exemplary gateway watches, though their 100m water resistance without a screw-down crown makes them unsuitable for diving. The Seiko 5 Sports SKX series is seen as a decent watch, especially under £200, but lacks the tool watch capabilities of the original SKX, missing a screw-down crown, bezel pip, and ISO rating. On balance, owners and reviewers rate the Seiko 5 Sports SKX series well for its blend of value, improved movement, and tool-watch aesthetic, despite some missing dive certifications.

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