Which is cheaper, the Borealis Watch Co. Jamanta or the Seiko Prospex Land Mechanical GMT?

At MSRP the Borealis Watch Co. Jamanta is the cheaper of the two at $415, against $1,150 for the Seiko Prospex Land Mechanical GMT — a $735 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Jamanta or the Seiko Prospex Land Mechanical GMT?

The Borealis Watch Co. Jamanta wears larger at 42.50mm versus 39.5mm for the Seiko Prospex Land Mechanical GMT — a 3mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Jamanta or the Seiko Prospex Land Mechanical GMT?

The Borealis Watch Co. Jamanta is rated to 300m versus 20m for the Seiko Prospex Land Mechanical GMT.

Which has a longer power reserve, the Borealis Watch Co. Jamanta or the Seiko Prospex Land Mechanical GMT?

The Seiko Prospex Land Mechanical GMT carries a 72-hour power reserve against 40 hours on the Borealis Watch Co. Jamanta.

What movement does the Borealis Watch Co. Jamanta run compared to the Seiko Prospex Land Mechanical GMT?

Both watches run automatic movements — the Borealis Watch Co. Jamanta uses the Miyota 9015 and the Seiko Prospex Land Mechanical GMT uses the 6R54.

Side by side

Borealis Watch Co. JamantavsSeiko Prospex Land Mechanical GMT

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

Borealis Watch Co.Jamanta

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

MSRP $415

Seiko Prospex Land Mechanical GMT

spb377j1

MSRP $1,150

At a glance

13 of 29 specs differ

Diameter

Jamanta42.50mm

Prospex Land Mechanical GMT39.5mm

Power Reserve

Jamanta40h

Prospex Land Mechanical GMT72h

Water Resistance

Jamanta300m

Prospex Land Mechanical GMT200m

MSRP

Jamanta$415

Prospex Land Mechanical GMT$1,150

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

BGW9

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Miyota 9015

6R54

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$415

$1,150

Follow this matchup

Get a note when Borealis Watch Co. Jamanta vs Seiko Prospex Land Mechanical GMT gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring