Islander Bayport Automatic DivervsSan Martin BB58

Bayport Automatic Diver
IslanderBayport Automatic Diver

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

BB58
San MartinBB58

Ref. eu-warehouse-san-martin-40mm-bb58-automatic-watcth-sn0128·MSRP $288

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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.

Islander Bayport Automatic Diver at true scale

Bayport Automatic Diver

San Martin BB58 at true scale

BB58

Diameter

40mm

40mm

Lug-to-Lug

40mm

n/a

Thickness

13.5mm

n/a

Water Resistance

200m

200m

MSRP

$349

$288

lowest

Movement

Seiko NH35

Seiko NH35

Case

3 specs
Thickness
13.5mm
n/a
Lug-to-Lug
40mm
n/a
Lug Width
20mm
n/a

Pricing

1 specs
MSRP
$349
$288
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Islander Bayport Automatic Diver

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.

San Martin BB58

Owners widely praise the San Martin BB58 as a high-quality BB58 homage that feels premium for the money; one calls it "basically as close as you can get without paying Tudor prices" and another describes it as fantastic quality for the price. Specific highlights include its gorgeous yet masculine look and the on-the-fly adjustable clasp, which one owner says they have not seen matched on any $1k watch. One owner's own San Martin runs within about 6 seconds per day and has never missed a beat. The main criticism is that one owner would like the riveted links and logo changed, and a forum member notes that some advise avoiding these watches without explaining why. Overall, owners rate the San Martin BB58 very highly for its value and finishing, with the clasp and styling cited as the standout reasons.