Which is cheaper, the Borealis Watch Co. Caloura 300m or the Fortis Marinemaster M-40?

At MSRP the Borealis Watch Co. Caloura 300m is the cheaper of the two at $275, against $3,520 for the Fortis Marinemaster M-40 — a $3,245 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Caloura 300m or the Fortis Marinemaster M-40?

The Borealis Watch Co. Caloura 300m wears larger at 42mm versus 40mm for the Fortis Marinemaster M-40 — a 2mm difference across the dial.

Which has a longer power reserve, the Borealis Watch Co. Caloura 300m or the Fortis Marinemaster M-40?

The Borealis Watch Co. Caloura 300m carries a 40-hour power reserve against 38 hours on the Fortis Marinemaster M-40.

What movement does the Borealis Watch Co. Caloura 300m run compared to the Fortis Marinemaster M-40?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Fortis Marinemaster M-40 uses the Sellita SW220-1.

Side by side

Borealis Watch Co. Caloura 300mvsFortis Marinemaster M-40

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

Borealis Watch Co.Caloura 300m

borealis-caloura-diver-watch

MSRP $275

Fortis Marinemaster M-40

M-40

MSRP $3,520

At a glance

10 of 29 specs differ

Diameter

Caloura 300m42mm

Marinemaster M-4040mm

Power Reserve

Caloura 300m40h

Marinemaster M-4038h

Water Resistance

Caloura 300m300m

Marinemaster M-40300m

MSRP

Caloura 300m$275

Marinemaster M-40$3,520

Full specifications

Case

4 specs

Diameter

42mm

40mm

Thickness

13.9mm

13mm

Lug-to-Lug

44.20mm

—

Lug Width

22mm

21mm

Crystal & Dial

2 specs

Dial Color

Black

Orange

Lume

BGW9

None

Movement

3 specs

Caliber

NH35

Sellita SW220-1

Power Reserve

40h

38h

Jewels

Pricing

1 specs

MSRP

$275

$3,520

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