Which is cheaper, the Borealis Watch Co. Neptuno or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition?

At MSRP the Borealis Watch Co. Neptuno is the cheaper of the two at $390, against $3,900 for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition — a $3,510 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Neptuno or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition wears larger at 42.6mm versus 40.00mm for the Borealis Watch Co. Neptuno — a 2.6mm difference across the dial.

Which has a longer power reserve, the Borealis Watch Co. Neptuno or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition carries a 72-hour power reserve against 40 hours on the Borealis Watch Co. Neptuno.

What movement does the Borealis Watch Co. Neptuno run compared to the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition?

Both watches run automatic movements — the Borealis Watch Co. Neptuno uses the NH38 and the Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition uses the 8L45.

Side by side

Borealis Watch Co. NeptunovsSeiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Borealis Watch Co.Neptuno

borealis-neptuno-red-fade-to-black-dial-no-date-nh38-automatic-movement-300m-diver-watch

MSRP $390

Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition

hbf002j1

MSRP $3,900

At a glance

11 of 29 specs differ

Diameter

Neptuno40.00mm

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition42.6mm

Power Reserve

Neptuno40h

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition72h

Water Resistance

Neptuno300m

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition300m

MSRP

Neptuno$390

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition$3,900

Full specifications

Case

4 specs

Diameter

40.00mm

42.6mm

Thickness

14.10mm

14.1mm

Lug-to-Lug

47.20mm

49.3mm

Lug Width

20mm

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

BGW9

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

NH38

8L45

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$390

$3,900

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