Which is cheaper, the Fortis Marinemaster M-40 or the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

At MSRP the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 is the cheaper of the two at $399, against $3,520 for the Fortis Marinemaster M-40 — a $3,121 gap before any retailer discounting.

Which is bigger, the Fortis Marinemaster M-40 or the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

The Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 wears larger at 45mm versus 40mm for the Fortis Marinemaster M-40 — a 5mm difference across the dial.

Which has better water resistance, the Fortis Marinemaster M-40 or the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

The Fortis Marinemaster M-40 is rated to 300m versus 200m for the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301.

What movement does the Fortis Marinemaster M-40 run compared to the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301?

Both watches run automatic movements — the Fortis Marinemaster M-40 uses the Sellita SW220-1 and the Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 uses the Seiko NH36.

Side by side

Fortis Marinemaster M-40vsIslander 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.

Fortis Marinemaster M-40

M-40

MSRP $3,520

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

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

MSRP $399

At a glance

16 of 29 specs differ

Diameter

Marinemaster M-4040mm

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

Power Reserve

Marinemaster M-4038h

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

Water Resistance

Marinemaster M-40300m

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

MSRP

Marinemaster M-40$3,520

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

Full specifications

Case

7 specs

Diameter

40mm

45mm

Thickness

13mm

15mm

Lug-to-Lug

—

47mm

Lug Width

21mm

22mm

Finish

Brushed and polished

—

Water Resistance

300m

200m

Caseback

Solid

Embossed screw-in caseback

Crystal & Dial

4 specs

Crystal Shape

Flat

Double Domed

AR Coating

Inner

Underside

Dial Color

Orange

—

Indices

Applied

—

Movement

4 specs

Caliber

Sellita SW220-1

Seiko NH36

Beat Rate

28,800 vph

0 vph

Power Reserve

38h

Jewels

Pricing

1 specs

MSRP

$3,520

$399

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