Side by side

Spinnaker Dumas GMTvsYema Wristmaster Slim CMM.20

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
Wristmaster Slim CMM.20
YemaWristmaster Slim CMM.20
MSRP $2,117

At a glance

8 of 29 specs differ
Diameter
Dumas GMT44mm
Wristmaster Slim CMM.2039mm
Power Reserve
Dumas GMT40h
Wristmaster Slim CMM.2040h
Water Resistance
Dumas GMT300m
Wristmaster Slim CMM.20100m
MSRP
Dumas GMT$399
Wristmaster Slim CMM.20$2,117

Full specifications

Case

5 specs
Diameter
44mm
39mm
Thickness
15mm
9mm
Lug-to-Lug
48mm
Lug Width
22mm
24mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
Blue
Black

Movement

1 specs
Caliber
Seiko NH34A
Yema CMM.20

Pricing

1 specs
MSRP
$399
$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.

Spinnaker Dumas GMT

Owners praise the Spinnaker Dumas GMT's satisfying lume, including on the crown, and good finishing, with one owner finding it wears well on a 17cm wrist. The watch features a Seiko NH34A GMT movement and a blue gradient dial. Reviewers note its 44mm diameter and 209g weight on the bracelet make it unsuitable for smaller wrists.

Yema Wristmaster Slim CMM.20

The Yema Wristmaster Slim CMM.20 is widely praised for its compelling integrated bracelet design and comfortable 39mm wearability. Reviewers highlight its impressive value, featuring an in-house CMM.20 micro-rotor movement with a 70-hour power reserve, adjusted to -3/+7 seconds per day, all within a slim 9mm case. Some note the domed sapphire crystal can produce glare and the dial text is quite small. On balance, reviewers rate the Yema Wristmaster Slim CMM.20 highly for its integrated design and value proposition with a micro-rotor movement.

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