Nezumi Studios BaleinevsSan Martin Diving SN0009
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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.

Baleine

Diving SN0009
Diameter
40mm
44mm
Lug-to-Lug
47mm
n/a
Thickness
12.1mm
n/a
Water Resistance
200m
300m
highest
Power Reserve
42h
n/a
MSRP
$821
$278
lowest
Movement
Miyota 9039
Seiko NH35
Case
5 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Nezumi Studios Baleine for its stylish design updates, comfortable 40mm case size, and the soft feel of its strap, with one owner noting its striking appearance garners significant attention. Reviewers highlight its exceptional value, with the automatic version priced competitively, and appreciate the coin-edged bezel action. The watch features a boxed sapphire crystal, signed crown, buckle, and case back, and a textured matte black dial with applied numerals filled with warm-toned lume. Accuracy figures for the Miyota 9039 movement are stated as -10/+30 seconds per day, though actual performance is expected to be better, with one owner reporting initial fast running that settled. Some owners find the 40mm size ideal, while one wished for a smaller case. The gold DLC coating is a matter of personal preference, though it is acknowledged to be eye-catching. The included leather strap did not hold up well to sunscreen for one owner.
The cohesive, original vintage-inspired design is the primary strength. Lume performance is a weakness.
Owners widely praise the San Martin Diving SN0009's stunning looks, top-notch finishing, and build quality, with one owner noting its resemblance to a Grand Seiko and another highlighting crystal clarity. The watch features an enamel dial and updated BGW-X1 lume, and the smooth caseback and bracelet contribute to comfortable daily wear. Some owners find the 44mm case to be a "thick boy" at 13mm, and a few express that its proportions and dial are less classy than alternatives, with one noting the bracelet is less refined than previous versions. One owner reported receiving a unit with scratched AR coating and encountered significant warranty claim issues. Overall, owners rate the San Martin Diving SN0009 highly for its impressive finishing and build quality at its price point.
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