Santurce El TiburónvsYema 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.

El Tiburón

Skin Diver CMM.20
Diameter
39mm
39.5mm
Lug-to-Lug
46mm
lowest
47mm
Thickness
12.2mm
11.5mm
lowest
Water Resistance
300m
highest
200m
MSRP
$949
lowest
$2,372
Movement
Sellita SW200-1
Yema CMM.20
Case
5 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Santurce El Tiburón features a 39mm sandblasted steel case and a flat sapphire crystal with no glare. Reviewers praise its smooth and secure bezel action, along with excellent and even luminous material application on the hands and markers. Overall, owners rate the Santurce El Tiburón highly for its glare-free crystal and excellent lume application.
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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