San Martin Vintage MM300 Automatic SN0087vsSpinnaker Hull Diver
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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.

Vintage MM300 Automatic SN0087

Hull Diver
Diameter
44mm
42mm
Lug-to-Lug
n/a
47.5mm
Thickness
n/a
15mm
Water Resistance
300m
300m
MSRP
$198
lowest
$375
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 San Martin Vintage MM300 Automatic SN0087 is praised for its top-notch case and handset finishing, consistent with the brand's reputation. Despite its 44mm case and 14mm thickness, owners report it wears noticeably smaller and fits comfortably on a 7" wrist. Some owners find the design a "messy mixup" and note the lume is an "ugly yellow," preferring BGW9 over C3. One owner found the pin and collar bracelet difficult to resize, with the half-link prone to damage. Overall, owners rate the San Martin Vintage MM300 Automatic SN0087 highly for its impressive finishing and comfortable wearability despite its dimensions.
The Spinnaker Hull Diver is widely praised for its excellent build quality, with owners highlighting the milled clasp, solid links, and dual-part case construction that contributes to a reduced thickness. Reviewers and owners alike commend its great finishing, accurate Seiko NH35 movement, and the value it offers at its price point, with one owner calling it one of their best affordable watches. The blue dial is noted for its attractive play of light, and the sapphire crystal features a strong anti-reflective coating. However, the lume is considered average by some, and a few owners expressed a desire for a higher beat movement. The screwdown crown is easy to operate, and micro-adjustment on the bracelet allows for a good fit. On balance, owners rate the Spinnaker Hull Diver highly for its exceptional build quality and finishing at an affordable price.
The cushion case design and solid construction are praised. The bracelet is noted as solid stainless steel.
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