Borealis Watch Co. Caloura 300mvsWren Diver One Aqua

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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
Diver One Aqua
WrenDiver One Aqua

MSRP $965

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Buy from Wren 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

Wren Diver One Aqua at true scale

Diver One Aqua

Diameter

42mm

41mm

Lug-to-Lug

44.2mm

lowest

47mm

Thickness

13.9mm

13.3mm

lowest

Water Resistance

300m

highest

200m

Power Reserve

n/a

38h

MSRP

$275

lowest

$965

Movement

Seiko NH35

Sellita SW200-1

Case

6 specs
Diameter
42mm
41mm
Thickness
13.9mm
13.3mm
Lug-to-Lug
44.2mm
47mm
Lug Width
22mm
n/a
Material
Stainless Steel
steel
Water Resistance
300m
200m

Crystal & Dial

1 specs
Lume
BGW9
None

Movement

2 specs
Caliber
Seiko NH35
Sellita SW200-1
Power Reserve
0h
38h

Pricing

1 specs
MSRP
$275
$965
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