Thorn Diver T023 V1vsYema 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.

Diver T023 V1

Skin Diver CMM.20
Diameter
40mm
39.5mm
Lug-to-Lug
46.6mm
lowest
47mm
Thickness
12.3mm
11.5mm
lowest
Water Resistance
200m
200m
MSRP
$189
lowest
$2,372
Movement
PT5000
Yema CMM.20
Case
5 specsCrystal & Dial
3 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Thorn 40mm PT5000 Automatic Dive Watch T023 V1 for its value and vintage aesthetic, with many appreciating its wearability and proportions, which contribute to a slimmer profile than many similar watches. The PT5000 movement is specifically lauded for its smooth second-hand sweep and impressive accuracy, with one owner reporting within 0/+2 seconds per day. The bracelet is noted as a point of contention, with one owner finding it of lesser quality compared to other Thorn retro diver models. Overall, owners rate the Thorn 40mm PT5000 Automatic Dive Watch T023 V1 highly for its vintage charm and smooth-running movement at an accessible price point.
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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