Which is cheaper, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation?

At MSRP the Borealis Watch Co. Caloura 300m is the cheaper of the two at $275, against $2,800 for the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation — a $2,525 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation?

The Borealis Watch Co. Caloura 300m wears larger at 42mm versus 39.5mm for the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation — a 2.5mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation?

The Borealis Watch Co. Caloura 300m is rated to 300m versus 200m for the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation.

Which has a longer power reserve, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation?

The Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation carries a 45-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 Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation uses the 6L37.

Side by side

Borealis Watch Co. Caloura 300mvsSeiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation

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

Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation

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MSRP $2,800

At a glance

12 of 29 specs differ

Diameter

Caloura 300m42mm

Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation39.5mm

Power Reserve

Caloura 300m40h

Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation45h

Water Resistance

Caloura 300m300m

Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation200m

MSRP

Caloura 300m$275

Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation$2,800

Full specifications

Case

5 specs

Diameter

42mm

39.5mm

Thickness

13.9mm

12.3mm

Lug-to-Lug

44.20mm

47.2mm

Lug Width

22mm

20mm

Water Resistance

300m

200m

Crystal & Dial

3 specs

Crystal Shape

Flat

Box

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

BGW9

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

NH35

6L37

Power Reserve

40h

45h

Jewels

Pricing

1 specs

MSRP

$275

$2,800

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