Which is cheaper, the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 or the Seiko Prospex Sea 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 $1,300 for the Seiko Prospex Sea 1965 Heritage Diver's Watch — a $901 gap before any retailer discounting.

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

The Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 wears larger at 45mm versus 40mm for the Seiko Prospex Sea 1965 Heritage Diver's Watch — a 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 Sea 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 Sea 1965 Heritage Diver's Watch uses the 6R55.

Side by side

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

Q: Which has better water resistance, the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 or the Seiko Prospex Sea 1965 Heritage Diver's Watch?

The Seiko Prospex Sea 1965 Heritage Diver's Watch is rated to 300m versus 200m for the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301.

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

islander-automatic-turtle-dive-watch-with-blue-dial-isl-301

MSRP $399

Seiko Prospex Sea 1965 Heritage Diver's Watch

spb451j1

MSRP $1,300

At a glance

17 of 29 specs differ

Diameter

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

Prospex Sea 1965 Heritage Diver's Watch40mm

Power Reserve

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

Prospex Sea 1965 Heritage Diver's Watch72h

Water Resistance

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

Prospex Sea 1965 Heritage Diver's Watch300m

MSRP

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

Prospex Sea 1965 Heritage Diver's Watch$1,300

Full specifications

Case

7 specs

Diameter

45mm

40mm

Thickness

15mm

13mm

Lug-to-Lug

47mm

46.4mm

Lug Width

22mm

20mm

Finish

—

Brushed and polished

Water Resistance

200m

300m

Caseback

Embossed screw-in caseback

Solid

Crystal & Dial

5 specs

Crystal Shape

Double Domed

Curved

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

6R55

Beat Rate

0 vph

28,800 vph

Power Reserve

72h

Jewels

Pricing

1 specs

MSRP

$399

$1,300

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