Which is cheaper, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex Land Mechanical GMT?

At MSRP the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 is the cheaper of the two at $399, against $1,150 for the Seiko Prospex Land Mechanical GMT — a $751 gap before any retailer discounting.

Which is bigger, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex Land Mechanical GMT?

The Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 wears larger at 40mm versus 39.5mm for the Seiko Prospex Land Mechanical GMT — 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 Land Mechanical GMT?

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 Land Mechanical GMT uses the 6R54.

Side by side

Islander Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311vsSeiko Prospex Land Mechanical GMT

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 Land Mechanical GMT

spb377j1

MSRP $1,150

At a glance

15 of 29 specs differ

Diameter

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

Prospex Land Mechanical GMT39.5mm

Power Reserve

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

Prospex Land Mechanical GMT72h

Water Resistance

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

Prospex Land Mechanical GMT200m

MSRP

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

Prospex Land Mechanical GMT$1,150

Full specifications

Case

5 specs

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 and index(es)

Movement

4 specs

Caliber

Seiko NH35

6R54

Beat Rate

0 vph

28,800 vph

Power Reserve

72h

Jewels

Pricing

1 specs

MSRP

$399

$1,150

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