Alkin Watches Model TwovsYema Skin Diver CMM.20
The measurements
Sized up.
Catalogue photos are all shot at the same flattering size. These aren't: every case below shares one millimetre scale.

Model Two

Skin Diver CMM.20
Diameter
41mm
39.5mm
Lug-to-Lug
48mm
47mm
lowest
Thickness
12.8mm
11.5mm
lowest
Water Resistance
300m
highest
200m
MSRP
n/a
$2,372
Movement
Miyota 9039
Yema CMM.20
Case
5 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsWhat people say
Owners + reviewers, side by side.
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners praise the Alkin Watches Model Two for its exceptional dial legibility and minimalist dive watch design. The watch is considered a decent value proposition, featuring a sapphire crystal and the Miyota 9039 automatic movement, with pre-orders priced at £325. Overall, owners rate the Alkin Watches Model Two highly for its clear dial and value at the price point.
The watch features extreme lume and a reliable Miyota 9039 movement. Reviewers noted disagreement on the utility of the internal bi-directional bezel for quick timing compared to a standard external bezel.
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.
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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