Side by side

Seiko King Seiko KSKvsYema Superman Tourbillon CMM.31 Limited Edition

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

King Seiko KSK
SeikoKing Seiko KSK
MSRP $1,900
Superman Tourbillon CMM.31 Limited Edition
YemaSuperman Tourbillon CMM.31 Limited Edition
MSRP $13,000

At a glance

15 of 29 specs differ
Diameter
King Seiko KSK36.1mm
Superman Tourbillon CMM.31 Limited Edition43mm
Power Reserve
King Seiko KSK72h
Superman Tourbillon CMM.31 Limited Edition40h
Water Resistance
King Seiko KSK100m
Superman Tourbillon CMM.31 Limited Edition300m
MSRP
King Seiko KSK$1,900
Superman Tourbillon CMM.31 Limited Edition$13,000

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
36.1mm
43mm
Thickness
11.6mm
11.7mm
Lug-to-Lug
43mm
Lug Width
19mm
22mm
Water Resistance
100m
300m

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Box
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Steel
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
6R51
Yema CMM.31 Tourbillon
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$1,900
$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 King Seiko KSK

The King Seiko KSK is widely praised for its refined finishing, with owners and reviewers noting its sharp case, faceted lugs, and well-executed dial indices, often comparing its polishing favorably to Grand Seiko. Enthusiasts appreciate its slim, retro design, with some stating it wears smaller than its official size due to the cushion case and close-to-the-wrist feel. The use of the slimline Calibre 6L35 movement is seen as an upgrade, maintaining the watch's slender profile, though some owners express concern over the price point and the perceived value of the movement. Accuracy figures vary, with one owner reporting +5 to +7 seconds per day, while another notes +15/-10 seconds per day. Some owners have noted minor quality control issues such as misaligned screws or a burr on a hand. On balance, owners and reviewers rate the King Seiko KSK highly for its exceptional case and dial finishing at its price point.

Yema Superman Tourbillon CMM.31 Limited Edition

Owners praise the Yema Superman Tourbillon CMM.31 Limited Edition as an incredible and crazy watch, appreciating its unnecessary tourbillon complication and impressive specifications at a remarkable price point. The titanium construction contributes to comfort despite the 43mm case size. One reviewer notes the bracelet clasp's extension system is somewhat crude. On balance, owners and reviewers rate the Yema Superman Tourbillon CMM.31 Limited Edition highly for its compelling tourbillon feature at an accessible price.

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