San Martin Automatic Dive SN0123GvsSpinnaker Dumas Automatic
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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.

Automatic Dive SN0123G

Dumas Automatic
Diameter
44mm
44mm
Lug-to-Lug
n/a
48mm
Thickness
n/a
15mm
Water Resistance
200m
300m
highest
MSRP
$148
lowest
$239
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.
Owners widely praise the San Martin Automatic Dive SN0123G for its exceptional value, noting fantastic lume and construction for the price, with many appreciating the sandblasted steel finish and asymmetric case design as a wicked retro look. The bezel is found useful for tracking a second time zone. However, some owners find the 44mm case too large for smaller wrists. Accuracy varies, with one owner reporting a loss of about 3 seconds per day. One owner noted a crooked 6 o'clock index. Overall, owners rate the San Martin Automatic Dive SN0123G highly for its impressive finishing and tool watch utility at an accessible price point.
Owners widely praise the Spinnaker Dumas Automatic for its robust build quality, attractive textured blue dial, and excellent finishing for its price point. The watch is noted for its comfortable wearability, attributed to a short lug-to-lug distance, and owners report positive experiences with the Seiko NH35 movement. Some owners mention a mineral crystal instead of sapphire, a bracelet with a learning curve, and a crown that feels slightly small. Overall, owners rate the Spinnaker Dumas Automatic highly for its aesthetic appeal and solid construction at a fair price.
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