Borealis Watch Co. Caloura 300mvsIslander Automatic Diver #ISL-18

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Caloura 300m
Borealis Watch Co.Caloura 300m

MSRP $275

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Buy from Borealis Watch Co. Used on eBay
Automatic Diver #ISL-18
IslanderAutomatic Diver #ISL-18

MSRP $369

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Buy from Islander Used on eBay

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Borealis Watch Co. Caloura 300m at true scale

Caloura 300m

Islander Automatic Diver #ISL-18 at true scale

Automatic Diver #ISL-18

Diameter

42mm

43mm

Lug-to-Lug

44.2mm

lowest

46mm

Thickness

13.9mm

lowest

14mm

Water Resistance

300m

highest

200m

MSRP

$275

lowest

$369

Movement

Seiko NH35

Seiko NH36

Case

5 specs
Diameter
42mm
43mm
Thickness
13.9mm
14mm
Lug-to-Lug
44.2mm
46mm
Water Resistance
300m
200m
Caseback
n/a
Engraved screw-in back

Crystal & Dial

3 specs
Crystal Shape
n/a
Double Domed
AR Coating
n/a
Yes
Lume
BGW9
None

Movement

1 specs
Caliber
Seiko NH35
Seiko NH36

Pricing

1 specs
MSRP
$275
$369
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