Side by side

Borealis Watch Co. Caloura 300mvsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Caloura 300m
Borealis Watch Co.Caloura 300m
MSRP $275
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
SeikoProspex Marinemaster Marinemaster 1968 Heritage Diver's Watch
MSRP $2,900

At a glance

11 of 29 specs differ
Diameter
Caloura 300m42mm
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm
Power Reserve
Caloura 300m40h
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch50h
Water Resistance
Caloura 300m300m
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m
MSRP
Caloura 300m$275
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$2,900

Full specifications

Case

4 specs
Diameter
42mm
42.6mm
Thickness
13.9mm
13.4mm
Lug-to-Lug
44.20mm
49.3mm
Lug Width
22mm
20mm

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
BGW9
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
NH35
8L35
Power Reserve
40h
50h
Jewels
25
26

Pricing

1 specs
MSRP
$275
$2,900

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