Which is cheaper, the Borealis Watch Co. Caloura 300m or the Bremont Supermarine 500M?

At MSRP the Borealis Watch Co. Caloura 300m is the cheaper of the two at $275, against $4,700 for the Bremont Supermarine 500M — a $4,425 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Caloura 300m or the Bremont Supermarine 500M?

The Bremont Supermarine 500M wears larger at 43mm versus 42mm for the Borealis Watch Co. Caloura 300m — a 1mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Caloura 300m or the Bremont Supermarine 500M?

The Bremont Supermarine 500M is rated to 500m versus 300m for the Borealis Watch Co. Caloura 300m.

What movement does the Borealis Watch Co. Caloura 300m run compared to the Bremont Supermarine 500M?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Bremont Supermarine 500M uses the BE-92AE.

Side by side

Borealis Watch Co. Caloura 300mvsBremont Supermarine 500M

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 500M

sm43-dt-ss-bk-n-s

MSRP $4,700

At a glance

10 of 29 specs differ

Diameter

Caloura 300m42mm

Supermarine 500M43mm

Power Reserve

Caloura 300m40h

Supermarine 500M40h

Water Resistance

Caloura 300m300m

Supermarine 500M500m

MSRP

Caloura 300m$275

Supermarine 500M$4,700

Full specifications

Case

6 specs

Diameter

42mm

43mm

Thickness

13.9mm

13mm

Lug-to-Lug

44.20mm

—

Lug Width

22mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

300m

500m

Crystal & Dial

2 specs

Crystal

Sapphire

Domed Sapphire

Lume

BGW9

None

Movement

1 specs

Caliber

NH35

BE-92AE

Pricing

1 specs

MSRP

$275

$4,700

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