Which is cheaper, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition?

At MSRP the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 is the cheaper of the two at $399, against $1,250 for the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition — a $851 gap before any retailer discounting.

Which is bigger, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition wears larger at 40.5mm versus 40mm for the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 — a 0.5mm difference across the dial.

What movement does the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 run compared to the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition?

Both watches run automatic movements — the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 uses the Seiko NH35 and the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition uses the 6R35.

Side by side

Islander Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311vsSeiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Islander Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311

islander-bayport-automatic-dive-watch-with-blue-wave-dial-isl-311

MSRP $399

Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

spb297j1

MSRP $1,250

At a glance

14 of 29 specs differ

Diameter

Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-31140mm

Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition40.5mm

Power Reserve

Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311—

Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition70h

Water Resistance

Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311200m

Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition200m

MSRP

Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311$399

Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition$1,250

Full specifications

Case

4 specs

Diameter

40mm

40.5mm

Thickness

13.5mm

13.2mm

Lug-to-Lug

48mm

47.6mm

Finish

—

Brushed and polished

Crystal & Dial

5 specs

Crystal Shape

Flat

Curved

AR Coating

Yes

Anti-reflective coating on inner surface

Dial Color

—

Black

Indices

—

Applied

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Seiko NH35

6R35

Beat Rate

0 vph

28,800 vph

Power Reserve

70h

Jewels

Pricing

1 specs

MSRP

$399

$1,250

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