Side by side
Borealis Watch Co. JamantavsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Jamanta42.50mm
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm
Power Reserve
Jamanta40h
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch50h
Water Resistance
Jamanta300m
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m
MSRP
Jamanta$415
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$2,900
Full specifications
Case
4 specsDiameter
42.50mm
42.6mm
Thickness
13.30mm
13.4mm
Lug-to-Lug
50.40mm
49.3mm
Lug Width
22mm
20mm
Crystal & Dial
3 specsCrystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Miyota 9015
8L35
Power Reserve
40h
50h
Jewels
25
26
Pricing
1 specsMSRP
$415
$2,900
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