Which is cheaper, the Borealis Watch Co. Jamanta or the Grand Seiko SBGH289?

At MSRP the Borealis Watch Co. Jamanta is the cheaper of the two at $415, against $7,700 for the Grand Seiko SBGH289 — a $7,285 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Jamanta or the Grand Seiko SBGH289?

The Grand Seiko SBGH289 wears larger at 43.8mm versus 42.50mm for the Borealis Watch Co. Jamanta — a 1.3mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Jamanta or the Grand Seiko SBGH289?

The Borealis Watch Co. Jamanta is rated to 300m versus 200m for the Grand Seiko SBGH289.

Which has a longer power reserve, the Borealis Watch Co. Jamanta or the Grand Seiko SBGH289?

The Grand Seiko SBGH289 carries a 55-hour power reserve against 40 hours on the Borealis Watch Co. Jamanta.

What movement does the Borealis Watch Co. Jamanta run compared to the Grand Seiko SBGH289?

Both watches run automatic movements — the Borealis Watch Co. Jamanta uses the Miyota 9015 and the Grand Seiko SBGH289 uses the 9S85.

Side by side

Borealis Watch Co. JamantavsGrand Seiko SBGH289

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

Grand Seiko SBGH289

sbgh289g

MSRP $7,700

At a glance

10 of 29 specs differ

Diameter

Jamanta42.50mm

SBGH28943.8mm

Power Reserve

Jamanta40h

SBGH28955h

Water Resistance

Jamanta300m

SBGH289200m

MSRP

Jamanta$415

SBGH289$7,700

Full specifications

Case

5 specs

Diameter

42.50mm

43.8mm

Thickness

13.30mm

14.7mm

Lug-to-Lug

50.40mm

51mm

Lug Width

22mm

Water Resistance

300m

200m

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Lume

BGW9

None

Movement

2 specs

Caliber

Miyota 9015

9S85

Power Reserve

40h

55h

Pricing

1 specs

MSRP

$415

$7,700

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Borealis Watch Co. JamantavsGrand Seiko SBGH289

At a glance

Full specifications

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