Which is cheaper, the Borealis Watch Co. Caloura 300m or the Bremont Supermarine 300M?

At MSRP the Borealis Watch Co. Caloura 300m is the cheaper of the two at $275, against $3,550 for the Bremont Supermarine 300M — a $3,275 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Caloura 300m or the Bremont Supermarine 300M?

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

What movement does the Borealis Watch Co. Caloura 300m run compared to the Bremont Supermarine 300M?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Bremont Supermarine 300M uses the BE-92AE.

Side by side

Borealis Watch Co. Caloura 300mvsBremont Supermarine 300M

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

Bremont Supermarine 300M

sm40-nd-ss-gn-b

MSRP $3,550

At a glance

9 of 29 specs differ

Diameter

Caloura 300m42mm

Supermarine 300M40mm

Power Reserve

Caloura 300m40h

Supermarine 300M40h

Water Resistance

Caloura 300m300m

Supermarine 300M300m

MSRP

Caloura 300m$275

Supermarine 300M$3,550

Full specifications

Case

5 specs

Diameter

42mm

40mm

Thickness

13.9mm

12mm

Lug-to-Lug

44.20mm

—

Lug Width

22mm

20mm

Material

Stainless Steel

904L Stainless Steel

Crystal & Dial

2 specs

Dial Color

Black

Green

Lume

BGW9

None

Movement

1 specs

Caliber

NH35

BE-92AE

Pricing

1 specs

MSRP

$275

$3,550

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