Side by side

Borealis Watch Co. Caloura 300mvsSeiko Astron

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
Astron
SeikoAstron
MSRP $2,500

At a glance

13 of 29 specs differ
Diameter
Caloura 300m42mm
Astron42mm
Power Reserve
Caloura 300m40h
Astron40h
Water Resistance
Caloura 300m300m
Astron100m
MSRP
Caloura 300m$275
Astron$2,500

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
42mm
42mm
Thickness
13.9mm
12.4mm
Lug-to-Lug
44.20mm
49.5mm
Lug Width
22mm
14mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Super-clear coating
Lume
BGW9
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
NH35
5X83
Type
Automatic
Quartz
Jewels
25
14

Pricing

1 specs
MSRP
$275
$2,500

Follow this matchup

Get a note when Borealis Watch Co. Caloura 300m vs Seiko Astron gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Boldr Marine
Boldrmicro

Marine

2 variantsRef. marine-elewana
40mm·Automatic·200m WR
$439MSRP
—Used
Farer Segrave III
Farermicro
Monopusher Gmt

Segrave III

Ref. segrave
41mm·100m WR
$1,995MSRP
—Used
Boldr Odyssey Freediver
Boldrmicro

Odyssey Freediver

7 variantsRef. odyssey-freediver-202
40mm·Automatic·300m WR
$649MSRP
—Used
Helgray Skyfighter (Refurbished)
Helgraymicro

Skyfighter (Refurbished)

Ref. skyfighter-refurbished
42mm·Quartz
$199MSRP
—Used
Christopher Ward C60 Lympstone
Christopher Wardmicro

C60 Lympstone

6 watches · 9 variantsC60
40mm·Automatic·600m WR
$1,615MSRP
—Used
AVI-8 Hawker Hurricane Carey Dual Time
AVI-8micro

Hawker Hurricane Carey Dual Time

9 watches · 43 variantsHawker
43mm·Quartz
$260MSRP
—Used
Spinnaker Tesei Titanium
Spinnakermicro

Tesei Titanium

4 watches · 10 variantsTesei
42mm·Automatic·200m WR
$625MSRP
—Used
CWC Cabot Sea Falcon Watch
CWCmicro
Cabot Chronograph

Cabot Sea Falcon Watch

Ref. cabot-sea-falcon-chrono-diver-watch
41mm·Quartz·200m WR
$749MSRP
—Used
All alternatives to the Caloura 300m →All alternatives to the Astron →
Explore the full catalog
Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Boldr MarinevsSeiko AstronBoldr Odyssey FreedivervsSeiko AstronChristopher Ward C60 LympstonevsSeiko AstronSpinnaker Tesei TitaniumvsSeiko AstronBorealis Watch Co. Caloura 300mvsFarer Segrave IIIBorealis Watch Co. Caloura 300mvsHelgray Skyfighter (Refurbished)
Edit this comparisonAdd another watch