Islander Bayport Automatic DivervsSeiko HBC003J1

Bayport Automatic Diver
IslanderBayport Automatic Diver

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.

Islander Bayport Automatic Diver at true scale

Bayport Automatic Diver

Seiko HBC003J1 at true scale

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 specs
Diameter
40mm
39.5mm
Thickness
13.5mm
12mm
Lug-to-Lug
40mm
44.5mm

Crystal & Dial

1 specs
Dial Color
n/a
n/a

Movement

2 specs
Caliber
Seiko NH35
Seiko 6R55
Power Reserve
0h
72h

Pricing

1 specs
MSRP
$349
$995
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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.

Seiko HBC003J1

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.