Which is cheaper, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Sea Save the Ocean Special Edition?

At MSRP the Borealis Watch Co. Caloura 300m is the cheaper of the two at $275, against $625 for the Seiko Prospex Sea Save the Ocean Special Edition — a $350 gap before any retailer discounting.

Which is bigger, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Sea Save the Ocean Special Edition?

The Seiko Prospex Sea Save the Ocean Special Edition wears larger at 45mm versus 42mm for the Borealis Watch Co. Caloura 300m — a 3mm difference across the dial.

Which has better water resistance, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Sea Save the Ocean Special Edition?

The Borealis Watch Co. Caloura 300m is rated to 300m versus 200m for the Seiko Prospex Sea Save the Ocean Special Edition.

Which has a longer power reserve, the Borealis Watch Co. Caloura 300m or the Seiko Prospex Sea Save the Ocean Special Edition?

The Seiko Prospex Sea Save the Ocean Special Edition 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 Seiko Prospex Sea Save the Ocean Special Edition?

Both watches run automatic movements — the Borealis Watch Co. Caloura 300m uses the NH35 and the Seiko Prospex Sea Save the Ocean Special Edition uses the 4R36.

Side by side

Borealis Watch Co. Caloura 300mvsSeiko Prospex Sea Save the Ocean Special Edition

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 Sea Save the Ocean Special Edition

srpf77

MSRP $625

At a glance

11 of 29 specs differ

Diameter

Caloura 300m42mm

Prospex Sea Save the Ocean Special Edition45mm

Power Reserve

Caloura 300m40h

Prospex Sea Save the Ocean Special Edition41h

Water Resistance

Caloura 300m300m

Prospex Sea Save the Ocean Special Edition200m

MSRP

Caloura 300m$275

Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

5 specs

Diameter

42mm

45mm

Thickness

13.9mm

13.2mm

Lug-to-Lug

44.20mm

47.7mm

Lug Width

22mm

Water Resistance

300m

200m

Crystal & Dial

2 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

BGW9

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

NH35

4R36

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$275

$625

Follow this matchup

Get a note when Borealis Watch Co. Caloura 300m vs Seiko Prospex Sea Save the Ocean Special Edition gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring