Certina DS-2vsYema Skin Diver CMM.20
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

DS-2

Skin Diver CMM.20
Diameter
40mm
39.5mm
Lug-to-Lug
45.7mm
lowest
47mm
Thickness
12.7mm
11.5mm
lowest
Water Resistance
200m
200m
Power Reserve
80h
n/a
MSRP
$1,107
lowest
$2,372
Movement
POWERMATIC 80.611
Yema CMM.20
Case
4 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Certina DS-2 for its legible 40mm case, beautiful date window, and stunning lume, complemented by its robust 200m water resistance and Certina's Double Security system. Reviewers highlight its value, historical authenticity, and solid build, with one noting the dynamic sunburst red dial. Some owners express surprise at a reported hand motor malfunction, while others are pleasantly surprised by the quality of the case, dial, and movement. A few reviewers and owners would prefer an engraved case back over the exhibition case back and one owner found the bracelet to feel low quality. Overall, owners and reviewers rate the Certina DS-2 highly for its excellent value and faithful vintage-inspired design.
The Yema Skin Diver CMM.20 is lauded for its vintage aesthetic, 39.5mm case size, and well-proportioned handset with sharp indices. Owners praise its textured cream dial, French tool watch elegance, and the smooth winding feel of the in-house CMM.20 micro-rotor movement. The fully brushed bracelet with toolless micro-adjust clasp is considered Yema's best yet. Accuracy readings range from -3/+7 seconds per day to approximately 0 to -10 seconds per day. Some reviewers noted questionable finishing on a prototype's hour hand and a rattly, stamped clasp. The watch's pricing has been questioned by some due to brand QC reputation, and its extended lug-to-lug may challenge smaller wrists. On balance, owners and reviewers appreciate the Yema Skin Diver CMM.20 for its vintage styling and improved bracelet design at its price point.
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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