Side by side

Gruppo Gamma Field III GMT DatevsYema Skin Diver Slim CMM.20

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

Field III GMT Date
Gruppo GammaField III GMT Date
MSRP $459
Skin Diver Slim CMM.20
YemaSkin Diver Slim CMM.20
MSRP $2,117

At a glance

14 of 29 specs differ
Diameter
Field III GMT Date40mm
Skin Diver Slim CMM.2047mm
Power Reserve
Field III GMT Date41h
Skin Diver Slim CMM.2040h
Water Resistance
Field III GMT Date200m
Skin Diver Slim CMM.20200m
MSRP
Field III GMT Date$459
Skin Diver Slim CMM.20$2,117

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
40mm
47mm
Thickness
14mm
10mm
Lug-to-Lug
48.5mm
47mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Black
Steel
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Seiko Instruments NH38A
Yema CMM.20
Power Reserve
41h
40h
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$459
$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.

Gruppo Gamma Field III GMT Date

Owners widely praise the Gruppo Gamma Field III GMT Date for its awesome looks, quality, and good value. The watch features a 40mm brushed 316L stainless steel case, box sapphire crystal, and 200m water resistance, powered by a Seiko NH34A movement. Some reviewers note the NH34A movement's accuracy can range from -20~+40 seconds per day, though one reviewer reported +5 seconds per day with a regulated movement. The dial's dense layout with Arabic numerals can be overwhelming for some, and one owner found the size unsuitable for smaller wrists. On balance, owners rate the Gruppo Gamma Field III GMT Date highly for its impressive finishing and toolish design at its price point.

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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