Side by side

Seiko King Seiko KSKvsYema Superman Steel CMM.10

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

King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300
Superman Steel CMM.10
YemaSuperman Steel CMM.10
MSRP $1,890

At a glance

14 of 29 specs differ
Diameter
King Seiko KSK38.6mm
Superman Steel CMM.1039mm
Power Reserve
King Seiko KSK45h
Superman Steel CMM.1040h
Water Resistance
King Seiko KSK50m
Superman Steel CMM.10300m
MSRP
King Seiko KSK$3,300
Superman Steel CMM.10$1,890

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
38.6mm
39mm
Thickness
10.7mm
11.3mm
Lug-to-Lug
45.8mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
300m

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Box
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Steel

Movement

3 specs
Caliber
6L35
Yema CMM.10
Power Reserve
45h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,300
$1,890

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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

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

Yema Superman Steel CMM.10

Owners widely praise the Yema Superman Steel CMM.10 for its refined casework, including polished lug bevels and an elegant crown guard, and its comfortable 39mm x 10.5mm dimensions. The glossy black lacquer dial and bezel insert are noted for adding depth, and the in-house CMM.10 movement is reported to be accurate, with one owner observing a loss of only 2 seconds over 2 days. The scales bracelet is described as gorgeous and nearly invisible on the wrist, though some find its polished center links too flashy. One reviewer flagged the signature bezel lock mechanism as flimsy and inconvenient. The CMM.10 automatic movement offers a 70-hour power reserve and is regulated to within +5/-3 seconds per day. On balance, owners and reviewers rate the Yema Superman Steel CMM.10 highly for its refined finishing and comfortable wearability at its price point.

From video reviewers

The Yema Steel features an in-house movement with a micro-rotor, one of the most beautiful at this price point. The watch's clasp feels a bit thin, which is a notable drawback. Reviewers disagree on the movement's power reserve, with one reviewer noting a 42-hour reserve and the other not mentioning power reserve at all.

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