Side by side

Seiko 5 Sports SKX seriesvsYema Superman Titanium Tourbillon CMM.31 Limited Edition

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

5 Sports SKX series
Seiko5 Sports SKX series
MSRP $350
Superman Titanium Tourbillon CMM.31 Limited Edition
YemaSuperman Titanium Tourbillon CMM.31 Limited Edition
MSRP $13,000

At a glance

13 of 29 specs differ
Diameter
5 Sports SKX series38mm
Superman Titanium Tourbillon CMM.31 Limited Edition43mm
Power Reserve
5 Sports SKX series41h
Superman Titanium Tourbillon CMM.31 Limited Edition40h
Water Resistance
5 Sports SKX series100m
Superman Titanium Tourbillon CMM.31 Limited Edition300m
MSRP
5 Sports SKX series$350
Superman Titanium Tourbillon CMM.31 Limited Edition$13,000

Full specifications

Case

6 specs
Diameter
38mm
43mm
Thickness
12.1mm
11.7mm
Lug-to-Lug
44.2mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
100m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
4R36
Yema CMM.31 Tourbillon
Power Reserve
41h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$350
$13,000

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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.

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.

Yema Superman Titanium Tourbillon CMM.31 Limited Edition

The Yema Superman Titanium Tourbillon CMM.31 Limited Edition is noted for its in-house titanium tourbillon movement offering a 105-hour power reserve and 200m water resistance, alongside a unique asphalt-grained dial. Owners find the 43mm size wearable, with one describing it as a contradictory "toolwatch" with exceptional movement craftsmanship. A reviewer flags the bracelet clasp's extension system as crude. On balance, owners and reviewers highlight the impressive movement and dial as key strengths of the Yema Superman Titanium Tourbillon CMM.31 Limited Edition.

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