Which is cheaper, the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

At MSRP the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 is the cheaper of the two at $429, against $1,150 for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition — a $721 gap before any retailer discounting.

Which is bigger, the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition wears larger at 39.5mm versus 38mm for the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 — a 1.5mm difference across the dial.

Which has better water resistance, the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 is rated to 200m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition.

What movement does the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 run compared to the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

Both watches run automatic movements — the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 uses the Seiko NH36 and the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition uses the 6R55.

Side by side

Islander Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63vsSeiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

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

Islander Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63

islander-38mm-automatic-dive-watch-with-radiant-blue-dial-isl-63

MSRP $429

Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

spb517j1

MSRP $1,150

At a glance

15 of 29 specs differ

Diameter

Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-6338mm

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition39.5mm

Power Reserve

Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63—

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition72h

Water Resistance

Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63200m

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition200m

MSRP

Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63$429

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition$1,150

Full specifications

Case

5 specs

Crystal & Dial

5 specs

Crystal Shape

Double Domed

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 NH36

6R55

Beat Rate

0 vph

28,800 vph

Power Reserve

72h

Jewels

Pricing

1 specs

MSRP

$429

$1,150

Follow this matchup

Get a note when Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 vs Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63

The Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 is praised for its screw pins, milled scissor clasp, and embossed ceramic bezel, offering excellent specifications for its price. Owners note its better alignment compared to some alternatives and appreciate its design inspiration. Overall, owners rate the Islander 38mm Automatic Dive Watch with Radiant Blue Dial #ISL-63 highly for its build features and value.

Reddit·2

Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition is praised for its vintage racing concept, applied markers, and dial that shifts from cream to silver with orange accents. Owners appreciate the Datsun logo, dual crowns, and internal countdown bezel, with some noting Seiko's finishing is top-notch. However, some find the dial text cluttered, particularly "automatic 3 days," and consider the price point too high. The watch features a 42mm black-coated stainless steel case, an external tachymeter bezel, and Seiko's 8R48 automatic chronograph movement with a 45-hour power reserve. On balance, owners rate the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition well for its unique vintage concept and quality finishing, though price remains a point of contention for some.

Keep exploring