Which is cheaper, the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 or the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

At MSRP the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 is the cheaper of the two at $399, against $2,800 for the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch — a $2,401 gap before any retailer discounting.

Which is bigger, the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 or the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

The Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 wears larger at 45mm versus 39.5mm for the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch — a 5.5mm difference across the dial.

What movement does the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 run compared to the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

Both watches run automatic movements — the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 uses the Seiko NH36 and the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch uses the 6L37.

Side by side

Islander Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301vsSeiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

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

Islander Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301

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MSRP $399

Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

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MSRP $2,800

At a glance

16 of 29 specs differ

Diameter

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-30145mm

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch39.5mm

Power Reserve

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301—

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch45h

Water Resistance

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301200m

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch200m

MSRP

Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301$399

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch$2,800

Full specifications

Case

6 specs

Diameter

45mm

39.5mm

Thickness

15mm

12.3mm

Lug-to-Lug

47mm

47.2mm

Lug Width

22mm

20mm

Finish

—

Brushed and polished

Caseback

Embossed screw-in caseback

Solid

Crystal & Dial

5 specs

Crystal Shape

Double Domed

Box

AR Coating

Underside

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 NH36

6L37

Beat Rate

0 vph

28,800 vph

Power Reserve

45h

Jewels

Pricing

1 specs

MSRP

$399

$2,800

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