Side by side
Borealis Watch Co. Caloura 300mvsOak & Oscar The Humboldt GMT Titanium
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
Caloura 300m42mm
The Humboldt GMT Titanium39.5mm
Power Reserve
Caloura 300m40h
The Humboldt GMT Titanium56 hoursh
Water Resistance
Caloura 300m300m
The Humboldt GMT Titanium200m
MSRP
Caloura 300m$275
The Humboldt GMT Titanium$2,950
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
42mm
39.5mm
Thickness
13.9mm
12.5mm
Lug-to-Lug
44.20mm
46.8mm
Lug Width
22mm
20mm
Material
Stainless Steel
Grade 5 Titanium
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down
Crystal & Dial
4 specsCrystal Shape
Flat
Double-domed
AR Coating
Inner
Underside
Dial Color
Black
Green
Lume
BGW9
Super-LumiNova
Movement
3 specsCaliber
NH35
Sellita SW330
Beat Rate
28,800 vph
4 vph
Power Reserve
40h
56 hoursh
Pricing
1 specsMSRP
$275
$2,950
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