Chronotechna NanoBlackvsYema Urban Traveller
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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.

NanoBlack

Urban Traveller
Diameter
42mm
39mm
Lug-to-Lug
47.9mm
n/a
Thickness
11.7mm
10.8mm
lowest
Water Resistance
100m
100m
Power Reserve
38h
n/a
MSRP
n/a
$1,090
Movement
Sellita SW200-1
Sellita SW200-1
Case
5 specsCrystal & Dial
1 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Chronotechna NanoBlack is noted for its pigment issues, with over 50% of the NanoBlack and VantaBlack pigments being rejected and requiring dial recalls and repainting. On balance, the Chronotechna NanoBlack is not rated well due to significant pigment and dial issues.
The Yema Urban Traveller is noted for its 39mm case size, offering balanced proportions, and its distinctive design. Owners and reviewers mention the in-house YEMA2000 movement, which provides a smooth sweep but has an average 42-hour power reserve and accuracy around +10 seconds per day. The case and bracelet finishing is described as simpler than some competitors, and the stamped dial texture can appear shallow. On balance, owners and reviewers find the Yema Urban Traveller a compelling challenger at its $890 price point, citing its solid build quality and Gallic flair.
The case finishing and integrated bracelet design are strong points. Durability against scratches and daily wear is a potential weakness. Reviewers disagreed on the value proposition compared to alternatives.
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