Side by side
Borealis Watch Co. Caloura 300mvsLongines ULTRA‑CHRON CARBON
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
20 of 29 specs differDiameter
Caloura 300m42mm
ULTRA‑CHRON CARBON43mm
Power Reserve
Caloura 300m40h
ULTRA‑CHRON CARBON52h
Water Resistance
Caloura 300m300m
ULTRA‑CHRON CARBON300m
MSRP
Caloura 300m$275
ULTRA‑CHRON CARBON$5,550
Full specifications
Case
7 specsDiameter
42mm
43mm
Thickness
13.9mm
14mm
Lug-to-Lug
44.20mm
48.9mm
Lug Width
22mm
22mm
Material
Stainless Steel
Titanium
Finish
Brushed and polished
—
Caseback
Solid
Screw-down case back
Crystal & Dial
5 specsCrystal Shape
Flat
—
AR Coating
Inner
Both sides
Dial Color
Black
Silver
Indices
Applied
Applied indexes
Lume
BGW9
Super-LumiNova
Movement
7 specsCaliber
NH35
L836.6
Beat Rate
28,800 vph
36,000 vph
Power Reserve
40h
52h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds
Pricing
1 specsMSRP
$275
$5,550
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