Spinnaker Fleuss 40 AutomaticvsSan Martin BB58

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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.

Fleuss 40 Automatic

BB58
Diameter
40mm
40mm
Lug-to-Lug
47mm
n/a
Thickness
11mm
n/a
Water Resistance
150m
200m
highest
MSRP
$450
$158
lowest
Movement
Seiko NH35
Seiko NH35
Case
5 specsCrystal & Dial
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Spinnaker Fleuss 40 Automatic is noted as a good size for smaller wrists, with one owner finding it comfortable on a 6.25-inch wrist. However, the lume is considered too diffuse for easy nighttime reading of the hands. The pilot-style crown is an unusual design choice for a dive watch. Overall, owners and reviewers find the Spinnaker Fleuss 40 Automatic to be a well-sized and comfortable watch with a unique crown design.
Owners rate the San Martin BB58 very highly for its build and value. Multiple owners praise the on-the-fly micro-adjust clasp as solid, functional and a standout addition, with one saying they have not seen a $1k watch that can touch it, and another calling the BB58 the superior homage to the original and "basically as close as you can get without paying Tudor prices." Owners describe it as premium rather than cheap, and one calls its quality fantastic for the price. Criticism is limited to one owner's objections to the riveted bracelet links and the logo. Overall, owners rate the San Martin BB58 as a standout value because its clasp, finishing and build punch well above its price.
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