Which is cheaper, the Borealis Watch Co. Jamanta or the Formex Reef 39.5 mm?

At MSRP the Borealis Watch Co. Jamanta is the cheaper of the two at $415, against $2,230 for the Formex Reef 39.5 mm — a $1,815 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Jamanta or the Formex Reef 39.5 mm?

The Borealis Watch Co. Jamanta wears larger at 42.50mm versus 39.5mm for the Formex Reef 39.5 mm — a 3mm difference across the dial.

Which has a longer power reserve, the Borealis Watch Co. Jamanta or the Formex Reef 39.5 mm?

The Formex Reef 39.5 mm carries a 56-hour power reserve against 40 hours on the Borealis Watch Co. Jamanta.

What movement does the Borealis Watch Co. Jamanta run compared to the Formex Reef 39.5 mm?

Both watches run automatic movements — the Borealis Watch Co. Jamanta uses the Miyota 9015 and the Formex Reef 39.5 mm uses the Sellita SW300-1.

Side by side

Borealis Watch Co. JamantavsFormex Reef 39.5 mm

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

Formex Reef 39.5 mm

reef-39.5-automatic-chronometer-cosc-300m-bahama-blue

MSRP $2,230

At a glance

9 of 29 specs differ

Diameter

Jamanta42.50mm

Reef 39.5 mm39.5mm

Power Reserve

Jamanta40h

Reef 39.5 mm56h

Water Resistance

Jamanta300m

Reef 39.5 mm300m

MSRP

Jamanta$415

Reef 39.5 mm$2,230

Full specifications

Case

4 specs

Diameter

42.50mm

39.5mm

Thickness

13.30mm

11mm

Lug-to-Lug

50.40mm

45.5mm

Lug Width

22mm

Crystal & Dial

2 specs

Dial Color

Black

Bahama Blue

Lume

BGW9

Super-LumiNova

Movement

2 specs

Caliber

Miyota 9015

Sellita SW300-1

Power Reserve

40h

56h

Pricing

1 specs

MSRP

$415

$2,230

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—Used

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Borealis Watch Co. JamantavsFormex Reef 39.5 mm

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