Borealis Watch Co. Caloura 300mvsSeiko Seiko 5 Sports SKX series

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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
Seiko 5 Sports SKX series
SeikoSeiko 5 Sports SKX series

MSRP $495

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Buy from Seiko 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

Seiko Seiko 5 Sports SKX series at true scale

Seiko 5 Sports SKX series

Diameter

42mm

42.5mm

Lug-to-Lug

44.2mm

lowest

46mm

Thickness

13.9mm

13.6mm

lowest

Water Resistance

300m

highest

100m

Power Reserve

n/a

41h

MSRP

$275

lowest

$495

Movement

Seiko NH35

Seiko 4R34

Case

5 specs
Category
Diver
GMT
Diameter
42mm
42.5mm
Thickness
13.9mm
13.6mm
Lug-to-Lug
44.2mm
46mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Crystal
Sapphire
Hardlex
Lume
BGW9
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Seiko NH35
Seiko 4R34
Power Reserve
0h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$275
$495
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