Side by side
Borealis Watch Co. Caloura 300mvsSeestern S450 Ocean Star
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
14 of 29 specs differDiameter
Caloura 300m42mm
S450 Ocean Star40mm
Power Reserve
Caloura 300m40h
S450 Ocean Star41h
Water Resistance
Caloura 300m300m
S450 Ocean Star100m
MSRP
Caloura 300m$275
S450 Ocean Star$299
Full specifications
Case
6 specsDiameter
42mm
40mm
Thickness
13.9mm
12mm
Lug-to-Lug
44.20mm
48mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m
Crystal & Dial
2 specsDial Color
Black
White
Lume
BGW9
Tritium
Movement
5 specsCaliber
NH35
TMI NH35A
Beat Rate
28,800 vph
21,600 vph
Power Reserve
40h
41h
Jewels
25
24
Complications
None
GMT, Date
Pricing
1 specsMSRP
$275
$299
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