Islander Bayport Automatic DivervsSeiko HBC003J1

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

HBC003J1
Diameter
40mm
39.5mm
Lug-to-Lug
40mm
lowest
44.5mm
Thickness
13.5mm
12mm
lowest
Water Resistance
200m
200m
Power Reserve
n/a
72h
MSRP
$349
lowest
$995
Movement
Seiko NH35
Seiko 6R55
Case
3 specsCrystal & Dial
1 specsMovement
2 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 praise the Seiko HBC003J1 for feeling more "alive" than alternatives. The movement settled to approximately -3 seconds per day, which is acceptable for daily wear when fully wound. Overall, owners rate the Seiko HBC003J1 well for its engaging character and acceptable timekeeping.
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