Side by side

Seiko 5 Sports SKX seriesvsStudio Underd0g Steffany Blue

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

What people say

Owners + reviewers, side by side

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

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.

Studio Underd0g Steffany Blue

Owners widely praise the Studio Underd0g Steffany Blue for its beautiful multilayer dial with a floating effect and vivid Super-LumiNova, with one owner finding it smaller and more beautiful than expected. The 37mm case wears nicely, though some find it slightly small for larger wrists. One owner notes the power reserve can fall short of the advertised 48 hours, sometimes lasting only about a day. Overall, owners rate the Studio Underd0g Steffany Blue highly for its striking dial and luminous display.

At a glance

15 of 29 specs differ
Diameter
5 Sports SKX series38mm
Steffany Blue39.5mm
Power Reserve
5 Sports SKX series41h
Steffany Blue
Water Resistance
5 Sports SKX series100m
Steffany Blue
MSRP
5 Sports SKX series$350
Steffany Blue$800

Full specifications

Case

6 specs
Category
Diver
Casual
Diameter
38mm
39.5mm
Thickness
12.1mm
Lug-to-Lug
44.2mm
Lug Width
20mm
Water Resistance
100m

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
Dial Color
Blue
Lume
LumiBrite on hands and index(es)
None

Movement

5 specs
Caliber
4R36
Type
Automatic
Manual
Power Reserve
41h
0h
Jewels
24
0
Hand-winding
No
Yes

Pricing

1 specs
MSRP
$350
$800
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