San Martin Turtle DivervsSpinnaker 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.

Turtle Diver

Dumas Automatic
Diameter
44mm
44mm
Lug-to-Lug
n/a
48mm
Thickness
n/a
15mm
Water Resistance
200m
300m
highest
MSRP
$199
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 Turtle Diver SN047 for its retro design, exceptional value, and impressive build quality, noting superior finishing and machining compared to other options. The watch features a striking blue sunburst dial, applied indices, and a ceramic bezel with excellent action, though some report minor back play. Its lume is consistently highlighted as remarkably bright and long-lasting, comparable to Seiko's LumiBrite. The Seiko NH35 movement is reliable, and the watch demonstrates remarkable accuracy, with one owner reporting it stayed within half a second of the correct time over 30 hours. While the 44mm case is noted as potentially large for smaller wrists, many find it wears smaller than its diameter suggests and is comfortable on average wrists. Some owners find the white date wheel distracting. Overall, owners rate the San Martin Turtle Diver SN047 highly for its outstanding finishing and vibrant dial at an exceptional 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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