Side by side

Grand Seiko SBGM245vsYema Skin Diver Slim CMM.20

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

SBGM245
Grand SeikoSBGM245
MSRP $6,100
Skin Diver Slim CMM.20
YemaSkin Diver Slim CMM.20
MSRP $2,117

At a glance

11 of 29 specs differ
Diameter
SBGM24540.5mm
Skin Diver Slim CMM.2047mm
Power Reserve
SBGM24572h
Skin Diver Slim CMM.2040h
Water Resistance
SBGM245200m
Skin Diver Slim CMM.20200m
MSRP
SBGM245$6,100
Skin Diver Slim CMM.20$2,117

Full specifications

Case

5 specs
Category
GMT
Diver
Diameter
40.5mm
47mm
Thickness
14.4mm
10mm
Lug-to-Lug
48.6mm
47mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

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

Movement

2 specs
Caliber
9S66
Yema CMM.20
Power Reserve
72h
40h

Pricing

1 specs
MSRP
$6,100
$2,117

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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 SBGM245

Owners widely appreciate the Grand Seiko SBGM245 for its blend of sport and luxury, with one enthusiast highlighting its superior workmanship over quartz movements. However, opinions on its size vary, as one owner found the SBGM245 too large, preferring the comfort of a different variant. Overall, owners value the Grand Seiko SBGM245 for its refined craftsmanship, though its wearability is a point of personal preference.

Yema Skin Diver Slim CMM.20

Owners and reviewers widely praise the Yema Skin Diver Slim CMM.20 for its balanced 39mm case, vintage aesthetic, and unique champagne dial. The proprietary CMM.20 micro-rotor movement is a notable feature, though some owners report potential QC issues including erratic timegrapher readings and second-hand stutter. The lume is described as subdued, and while some find the "dragon scale" bracelet beautiful, others consider it generic. The price point is a hurdle for some, and the stamped clasp quality is considered subpar by one reviewer, with a gap noted by an owner. The lack of hacking seconds is flagged as a drawback at its price. Overall, owners and reviewers rate the Yema Skin Diver Slim CMM.20 highly for its vintage charm and balanced wearability.

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