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 $315

At a glance

15 of 29 specs differ
Diameter
S450 Ocean Star40mm
5 Sports SKX series28mm
Power Reserve
S450 Ocean Star41h
5 Sports SKX series40h
Water Resistance
S450 Ocean Star100m
5 Sports SKX series100m
MSRP
S450 Ocean Star$299
5 Sports SKX series$315

Full specifications

Case

6 specs
Category
Diver
Sport
Diameter
40mm
28mm
Thickness
12mm
11.2mm
Lug-to-Lug
48mm
33.1mm
Lug Width
20mm
14mm
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

5 specs
Caliber
TMI NH35A
2R06
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
40h
Jewels
24
21
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$315

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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

Owners widely praise the Seiko 5 Sports SKX series for its iconic dive watch design, robust build, and excellent value, with many appreciating its timeless styling and tool-like character. The movement, while basic, is noted as offering hacking and hand-winding capabilities, and accuracy varies, with many owners reporting +/-5 to 10 seconds per day despite the movement's potential for +/-40 seconds. Some owners find the original SKX models heavier and bulkier than newer iterations, while others critique the lack of a screw-down crown and ISO rating on the newer Seiko 5 Sports SKX series, deeming it less of a serious tool watch. Overall, owners rate the Seiko 5 Sports SKX series highly for its enduring design and value proposition as a robust, everyday watch.

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