Side by side

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's WatchvsBorealis Watch Co. Jamanta

Q: Which is cheaper, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Borealis Watch Co. Jamanta?

At MSRP the Borealis Watch Co. Jamanta is the cheaper of the two at $415, against $3,600 for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — a $3,185 gap before any retailer discounting.

Q: Which is bigger, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Borealis Watch Co. Jamanta?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch wears larger at 42.6mm versus 42.50mm for the Borealis Watch Co. Jamanta — a 0.1mm difference across the dial.

Q: Which has a longer power reserve, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Borealis Watch Co. Jamanta?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch carries a 72-hour power reserve against 40 hours on the Borealis Watch Co. Jamanta.

Q: What movement does the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch run compared to the Borealis Watch Co. Jamanta?

Both watches run automatic movements — the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch uses the 8L45 and the Borealis Watch Co. Jamanta uses the Miyota 9015.

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

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

hbf001j1

MSRP $3,600

Borealis Watch Co.Jamanta

prometheus-jamanta-black-dial-date-miyota-9015

MSRP $415

At a glance

11 of 29 specs differ

Diameter

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm

Jamanta42.50mm

Power Reserve

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch72h

Jamanta40h

Water Resistance

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m

Jamanta300m

MSRP

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$3,600

Jamanta$415

Full specifications

Case

4 specs

Diameter

42.6mm

42.50mm

Thickness

14.1mm

13.30mm

Lug-to-Lug

49.3mm

50.40mm

Lug Width

20mm

22mm

Crystal & Dial

3 specs

Crystal Shape

Curved

Flat

AR Coating

Anti-reflective coating on inner surface

Inner

Lume

LumiBrite on hands, index(es) and bezel

BGW9

Movement

3 specs

Caliber

8L45

Miyota 9015

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

$3,600

$415

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