Which is bigger, the Borealis Watch Co. Caloura 300m or the Redux Zero-Hour?

The Borealis Watch Co. Caloura 300m wears larger at 42mm versus 39mm for the Redux Zero-Hour — a 3mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Caloura 300m or the Redux Zero-Hour?

The Borealis Watch Co. Caloura 300m is rated to 300m versus 200m for the Redux Zero-Hour.

Which has a longer power reserve, the Borealis Watch Co. Caloura 300m or the Redux Zero-Hour?

The Redux Zero-Hour carries a 41-hour power reserve against 40 hours on the Borealis Watch Co. Caloura 300m.

What movement does the Borealis Watch Co. Caloura 300m run compared to the Redux Zero-Hour?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Redux Zero-Hour uses the Seiko NH35.

Side by side

Borealis Watch Co. Caloura 300mvsRedux Zero-Hour

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

Redux Zero-Hour

the-courg-watch-zero-hour-39mm

At a glance

11 of 29 specs differ

Diameter

Caloura 300m42mm

Zero-Hour39mm

Power Reserve

Caloura 300m40h

Zero-Hour41h

Water Resistance

Caloura 300m300m

Zero-Hour200m

MSRP

Caloura 300m$275

Zero-Hour—

Full specifications

Case

7 specs

Crystal & Dial

1 specs

Lume

BGW9

None

Movement

2 specs

Caliber

NH35

Seiko NH35

Power Reserve

40h

41h

Pricing

1 specs

MSRP

$275

—

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Borealis Watch Co. Caloura 300mvsRedux Zero-Hour

At a glance

Full specifications

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