Side by side

Grand Seiko SBGM245vsYema Superman 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
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372

At a glance

11 of 29 specs differ
Diameter
SBGM24540.5mm
Superman Slim CMM.2039mm
Power Reserve
SBGM24572h
Superman Slim CMM.2040h
Water Resistance
SBGM245200m
Superman Slim CMM.20300m
MSRP
SBGM245$6,100
Superman Slim CMM.20$2,372

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
40.5mm
39mm
Thickness
14.4mm
9.95mm
Lug-to-Lug
48.6mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner

Movement

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

Pricing

1 specs
MSRP
$6,100
$2,372

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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 Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

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