Borealis Watch Co. JamantavsSeiko Prospex Sea 1968 Heritage Diver's GMT
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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.
Jamanta
Prospex Sea 1968 Heritage Diver's GMT
Diameter
42.5mm
42mm
Lug-to-Lug
50.4mm
48.6mm
lowest
Thickness
13.3mm
12.9mm
lowest
Water Resistance
300m
highest
200m
Power Reserve
n/a
72h
MSRP
$415
lowest
$1,500
Movement
Miyota 9015
Seiko 6R54
Case
5 specsDiameter
42.5mm
42mm
Thickness
13.3mm
12.9mm
Lug-to-Lug
50.4mm
48.6mm
Lug Width
22mm
20mm
Water Resistance
300m
200m
Crystal & Dial
2 specsAR Coating
n/a
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Miyota 9015
Seiko 6R54
Power Reserve
0h
72h
Jewels
0
24
Pricing
1 specsMSRP
$415
$1,500
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