What movement does the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 run compared to the Borealis Watch Co. Jamanta?

Both watches run automatic movements — the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 uses the Miyota 8205 and the Borealis Watch Co. Jamanta uses the Miyota 9015.

Side by side

Islander Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300vsBorealis Watch Co. Jamanta

Q: Which is cheaper, the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 or the Borealis Watch Co. Jamanta?

At MSRP the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 is the cheaper of the two at $399, against $415 for the Borealis Watch Co. Jamanta — a $16 gap before any retailer discounting.

Q: Which is bigger, the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 or the Borealis Watch Co. Jamanta?

The Borealis Watch Co. Jamanta wears larger at 42.50mm versus 39mm for the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 — a 3.5mm difference across the dial.

Q: Which has better water resistance, the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 or the Borealis Watch Co. Jamanta?

The Borealis Watch Co. Jamanta is rated to 300m versus 200m for the Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300.

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

Islander Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300

islander-greenport-39mm-dive-watch-with-black-and-white-dial-isl-300

MSRP $399

Borealis Watch Co.Jamanta

prometheus-jamanta-black-dial-date-miyota-9015

MSRP $415

At a glance

17 of 29 specs differ

Diameter

Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-30039mm

Jamanta42.50mm

Power Reserve

Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300—

Jamanta40h

Water Resistance

Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300200m

Jamanta300m

MSRP

Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300$399

Jamanta$415

Full specifications

Case

7 specs

Diameter

39mm

42.50mm

Thickness

13mm

13.30mm

Lug-to-Lug

0mm

50.40mm

Lug Width

20mm

22mm

Finish

—

Brushed and polished

Water Resistance

200m

300m

Caseback

Screw-down

Solid

Crystal & Dial

5 specs

Crystal Shape

—

Flat

AR Coating

Underside

Inner

Dial Color

—

Black

Indices

—

Applied

Lume

None

BGW9

Movement

4 specs

Caliber

Miyota 8205

Miyota 9015

Beat Rate

0 vph

28,800 vph

Power Reserve

40h

Jewels

Pricing

1 specs

MSRP

$399

$415

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