Side by side

Gruppo Gamma Vanguard WeatheredvsYema Skin Diver CMM.20

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

Vanguard Weathered
Gruppo GammaVanguard Weathered
MSRP $790
Skin Diver CMM.20
YemaSkin Diver CMM.20
MSRP $2,372

At a glance

15 of 29 specs differ
Diameter
Vanguard Weathered42mm
Skin Diver CMM.2039.5mm
Power Reserve
Vanguard Weathered42h
Skin Diver CMM.2040h
Water Resistance
Vanguard Weathered100m
Skin Diver CMM.20200m
MSRP
Vanguard Weathered$790
Skin Diver CMM.20$2,372

Full specifications

Case

8 specs
Category
Diver
Diameter
42mm
39.5mm
Thickness
12.6mm
11.5mm
Lug-to-Lug
49.5mm
47mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Weathered
Brushed and polished
Water Resistance
100m
200m

Crystal & Dial

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

Movement

2 specs
Caliber
Miyota 9039
Yema CMM.20
Power Reserve
42h
40h

Pricing

1 specs
MSRP
$790
$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.

Gruppo Gamma Vanguard Weathered

The satin-finished steel case is well-executed and aesthetically pleasing. The watch's lumières de nuit are not particularly bright, which might be a drawback for some users. Reviewers disagree on the watch's originality, with one reviewer finding it pleasing in-person and another describing it as decidedly derivative.

Yema Skin Diver CMM.20

Owners and reviewers widely praise the Yema Skin Diver CMM.20 for its vintage aesthetic, 39mm-39.5mm case size, and the in-house CMM.20 micro-rotor movement. The watch features a textured cream dial, sharp applied indices, and a satisfyingly over-engineered push-to-turn bi-directional bezel. The fully brushed bracelet with toolless micro-adjust clasp is highlighted as a significant improvement, though some note its extended lug-to-lug may challenge smaller wrists. Accuracy figures range from -3/+7 seconds per day to erratic results between 0 and -10 seconds per day, with a 70-hour power reserve. Some owners express concerns about the brand's QC reputation and the micro-rotor movement's performance, while one reviewer noted questionable finishing on a prototype's hour hand and a rattly clasp. Overall, owners and reviewers rate the Yema Skin Diver CMM.20 highly for its vintage styling and improved bracelet at the price.

From video reviewers

The sapphire bezel insert and in-house CMM.20 movement are noted strengths. Reviewers questioned the value proposition compared to other Yema models.

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