Borealis Watch Co. JamantavsSeiko Prospex Sea

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Jamanta
Borealis Watch Co.Jamanta

MSRP $415

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Buy from Borealis Watch Co. Used on eBay
Prospex Sea
SeikoProspex Sea

MSRP $1,500

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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. Jamanta at true scale

Jamanta

Seiko Prospex Sea at true scale

Prospex Sea

Diameter

42.5mm

43.5mm

Lug-to-Lug

50.4mm

lowest

51mm

Thickness

13.3mm

13.3mm

Water Resistance

300m

highest

200m

Power Reserve

n/a

70h

MSRP

$415

lowest

$1,500

Movement

Miyota 9015

Seiko 6R35

Case

4 specs
Diameter
42.5mm
43.5mm
Lug-to-Lug
50.4mm
51mm
Material
Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Miyota 9015
Seiko 6R35
Power Reserve
0h
70h
Jewels
0
24

Pricing

1 specs
MSRP
$415
$1,500
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