Side by side
Borealis Watch Co. Caloura 300mvsMarnaut Safe Harbour 100
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
Caloura 300m42mm
Safe Harbour 10039mm
Power Reserve
Caloura 300m40h
Safe Harbour 10041h
Water Resistance
Caloura 300m300m
Safe Harbour 100100m
MSRP
Caloura 300m$275
Safe Harbour 100$1,042
Full specifications
Case
6 specsCategory
Diver
—
Diameter
42mm
39mm
Thickness
13.9mm
13mm
Lug-to-Lug
44.20mm
45mm
Lug Width
22mm
20mm
Water Resistance
300m
100m
Crystal & Dial
1 specsLume
BGW9
SuperLuminova C3
Movement
2 specsCaliber
NH35
Sellita SW200-1
Power Reserve
40h
41h
Pricing
1 specsMSRP
$275
—
More watches worth a look
Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.
Follow this matchup
Get a note when Borealis Watch Co. Caloura 300m vs Marnaut Safe Harbour 100 gets more votes, a community discussion, or a price drop. No account needed.
People also compared
Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.
Boldr MarinevsMarnaut Safe Harbour 100Marnaut Safe Harbour 100vsBoldr Odyssey FreediverChristopher Ward C60 LympstonevsMarnaut Safe Harbour 100Marnaut Safe Harbour 100vsSpinnaker Tesei TitaniumBorealis Watch Co. Caloura 300mvsMarnaut Safe Harbour 100CBorealis Watch Co. Caloura 300mvsMarnaut Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons)













