DuFrane Watches Travis 39mm MkII Mechanical DivingvsIsotope Hydrium
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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.

Travis 39mm MkII Mechanical Diving

Hydrium
Diameter
39mm
40mm
Lug-to-Lug
47mm
n/a
Thickness
12mm
lowest
12.9mm
Water Resistance
200m
300m
highest
Power Reserve
38h
68h
highest
MSRP
$899
lowest
$1,701
Movement
Sellita SW200-1
La Joux-Perret G101
Case
5 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the DuFrane Watches Travis 39mm MkII Mechanical Diving Watch for its comfortable 39mm sizing and attractive dial features like depth and a sandwich chapter ring, with many appreciating the included strap options. Some owners report the bezel is difficult to turn and question its utility as a dive watch feature. On balance, owners rate the DuFrane Watches Travis 39mm MkII Mechanical Diving Watch highly for its wearability and dial aesthetics, particularly within the American microbrand space.
Owners widely report Isotope Hydrium watches offer unique and stunning designs with build quality considered a league above. Reviewers praise the watches for their compelling tool watch nature, originality, and strong value proposition, often highlighting specific elements like matte black dials, luminescent markings, Cerakote case finishes, and fully lumed dials. The 40mm micro-blasted stainless steel case is frequently noted for its comfortable wearability and Streamline Moderne-inspired design, blending familiar and new elements. However, the Landeron 24 automatic movement is consistently cited as running within +/- 12 seconds per day, with a 40-hour power reserve. Some reviewers also note the watch's thickness, around 14.9mm, can contribute to a chunky feel despite the 40mm diameter. Overall, owners and reviewers rate the Isotope Hydrium highly for its distinctive design and excellent value at its price point.
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