Side by side

Grand Seiko SLGW007vsYema Superman Steel CMM.10

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

SLGW007
Grand SeikoSLGW007
MSRP $10,000
Superman Steel CMM.10
YemaSuperman Steel CMM.10
MSRP $1,890

At a glance

14 of 29 specs differ
Diameter
SLGW00738.6mm
Superman Steel CMM.1039mm
Power Reserve
SLGW00780h
Superman Steel CMM.1040h
Water Resistance
SLGW00730m
Superman Steel CMM.10300m
MSRP
SLGW007$10,000
Superman Steel CMM.10$1,890

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
38.6mm
39mm
Thickness
9.95mm
11.3mm
Lug-to-Lug
45mm
Lug Width
20mm
19mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
30m
300m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Black
Steel

Movement

3 specs
Caliber
9SA4
Yema CMM.10
Type
Manual
Automatic
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$10,000
$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.

Grand Seiko SLGW007

Grand Seiko SLGW007 owners and reviewers praise its compact 38.6mm x 9.95mm Evolution 9 case and the textured "Moonlit Birch" dial, described as moody, elegant, and captivating. The technically credible 9SA4 hand-wound movement with an 80-hour power reserve is also highlighted. Its 30m water resistance and lack of lume are noted as appropriate for a dress watch. Overall, owners and reviewers rate the Grand Seiko SLGW007 highly for its refined case, captivating dial, and updated movement.

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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