Side by side

Seestern S446 GMTvsYema Wristmaster Slim CMM.20

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

S446 GMT
SeesternS446 GMT
MSRP $299
Wristmaster Slim CMM.20
YemaWristmaster Slim CMM.20
MSRP $2,117

At a glance

12 of 29 specs differ
Diameter
S446 GMT39.5mm
Wristmaster Slim CMM.2039mm
Power Reserve
S446 GMT41hh
Wristmaster Slim CMM.2040h
Water Resistance
S446 GMT100m
Wristmaster Slim CMM.20100m
MSRP
S446 GMT$299
Wristmaster Slim CMM.20$2,117

Full specifications

Case

4 specs
Diameter
39.5mm
39mm
Thickness
13mm
9mm
Lug-to-Lug
47mm
Lug Width
20mm
24mm

Crystal & Dial

2 specs
Crystal Shape
Domed
Flat
Dial Color
Cream
Black

Movement

5 specs
Caliber
Seiko NH34A GMT
Yema CMM.20
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$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.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

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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