Which is cheaper, the Borealis Watch Co. Caloura 300m or the Tudor Black Bay 58 GMT?

At MSRP the Borealis Watch Co. Caloura 300m is the cheaper of the two at $275, against $5,525 for the Tudor Black Bay 58 GMT — a $5,250 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Caloura 300m or the Tudor Black Bay 58 GMT?

The Borealis Watch Co. Caloura 300m wears larger at 42mm versus 39mm for the Tudor Black Bay 58 GMT — a 3mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Caloura 300m or the Tudor Black Bay 58 GMT?

The Borealis Watch Co. Caloura 300m is rated to 300m versus 200m for the Tudor Black Bay 58 GMT.

Which has a longer power reserve, the Borealis Watch Co. Caloura 300m or the Tudor Black Bay 58 GMT?

The Tudor Black Bay 58 GMT carries a 65-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 Tudor Black Bay 58 GMT?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Tudor Black Bay 58 GMT uses the MT5450-U.

Side by side

Borealis Watch Co. Caloura 300mvsTudor Black Bay 58 GMT

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

Tudor Black Bay 58 GMT

m7939g1a0nru-0002

MSRP $5,525

At a glance

19 of 29 specs differ

Diameter

Caloura 300m42mm

Black Bay 58 GMT39mm

Power Reserve

Caloura 300m40h

Black Bay 58 GMT65h

Water Resistance

Caloura 300m300m

Black Bay 58 GMT200m

MSRP

Caloura 300m$275

Black Bay 58 GMT$5,525

Full specifications

Case

8 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

—

AR Coating

Inner

—

Lume

BGW9

None

Movement

7 specs

Caliber

NH35

MT5450-U

Beat Rate

28,800 vph

0 vph

Power Reserve

40h

65h

Jewels

Hacking

Yes

Hand-winding

Yes

Complications

None

GMT

Pricing

1 specs

MSRP

$275

$5,525

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