Islander Bayport Automatic DivervsSan Martin BB58

Ref. islander-bayport-automatic-dive-watch-with-silver-white-wave-dial-isl-313·MSRP $349

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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.

Bayport Automatic Diver

BB58
Diameter
40mm
40mm
Lug-to-Lug
40mm
n/a
Thickness
13.5mm
n/a
Water Resistance
200m
200m
MSRP
$349
$158
lowest
Movement
Seiko NH35
Seiko NH35
Case
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Islander Bayport Automatic Dive Watch for its versatile 40mm case size and retro styling, featuring a unique grey dial with a framed date window and a pie pan design. Reviewers and owners alike highlight the watch's well-executed finishing with chamfered edges, a tight 120-click bezel, and the reliable Seiko NH35 automatic movement. Accuracy reports vary, with some owners seeing between -3 and +6 seconds per day, while others note that the NH36 movement in comparable models can be regulated to achieve near-zero daily deviation. Overall, owners and reviewers consider the Islander Bayport Automatic Dive Watch an exceptional value proposition for the brand.
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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