Side by side
Borealis Watch Co. NeptunovsSeiko Prospex SPEEDTIMER
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Neptuno40.00mm
Prospex SPEEDTIMER42.5mm
Power Reserve
Neptuno40h
Prospex SPEEDTIMER45h
Water Resistance
Neptuno300m
Prospex SPEEDTIMER100m
MSRP
Neptuno$390
Prospex SPEEDTIMER$3,000
Full specifications
Case
6 specsCategory
Diver
Chronograph
Diameter
40.00mm
42.5mm
Thickness
14.10mm
15.1mm
Lug-to-Lug
47.20mm
50mm
Lug Width
20mm
20mm
Water Resistance
300m
100m
Crystal & Dial
3 specsCrystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands and index(es)
Movement
3 specsCaliber
NH38
8R46
Power Reserve
40h
45h
Jewels
25
34
Pricing
1 specsMSRP
$390
$3,000
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