What movement does the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 run compared to the Seiko Prospex SPEEDTIMER?

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 SPEEDTIMER uses the 8R46.

Side by side

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

Q: Which is cheaper, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex SPEEDTIMER?

At MSRP the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 is the cheaper of the two at $399, against $3,000 for the Seiko Prospex SPEEDTIMER — a $2,601 gap before any retailer discounting.

Q: Which is bigger, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex SPEEDTIMER?

The Seiko Prospex SPEEDTIMER wears larger at 42.5mm versus 40mm for the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 — a 2.5mm difference across the dial.

Q: Which has better water resistance, the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 or the Seiko Prospex SPEEDTIMER?

The Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 is rated to 200m versus 10m for the Seiko Prospex SPEEDTIMER.

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 SPEEDTIMER

srq037j1

MSRP $3,000

At a glance

16 of 29 specs differ

Diameter

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

Prospex SPEEDTIMER42.5mm

Power Reserve

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

Prospex SPEEDTIMER45h

Water Resistance

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

Prospex SPEEDTIMER100m

MSRP

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

Prospex SPEEDTIMER$3,000

Full specifications

Case

6 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

8R46

Beat Rate

0 vph

28,800 vph

Power Reserve

45h

Jewels

Pricing

1 specs

MSRP

$399

$3,000

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