Side by side
Borealis Watch Co. JamantavsSeiko Prospex LX line
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Jamanta42.50mm
Prospex LX line44.8mm
Power Reserve
Jamanta40h
Prospex LX line72h
Water Resistance
Jamanta300m
Prospex LX line300m
MSRP
Jamanta$415
Prospex LX line$6,500
Full specifications
Case
5 specsDiameter
42.50mm
44.8mm
Thickness
13.30mm
15.7mm
Lug-to-Lug
50.40mm
50.9mm
Lug Width
22mm
22mm
Material
Stainless Steel
Titanium
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands and index(es)
Movement
4 specsCaliber
Miyota 9015
5R65
Type
Automatic
Spring Drive
Power Reserve
40h
72h
Jewels
25
30
Pricing
1 specsMSRP
$415
$6,500
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