Side by side
Borealis Watch Co. JamantavsLongines ULTRA-CHRON CLASSIC
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
21 of 29 specs differDiameter
Jamanta42.50mm
ULTRA-CHRON CLASSIC37mm
Power Reserve
Jamanta40h
ULTRA-CHRON CLASSIC52h
Water Resistance
Jamanta300m
ULTRA-CHRON CLASSIC50m
MSRP
Jamanta$415
ULTRA-CHRON CLASSIC$3,900
Full specifications
Case
8 specsCategory
Diver
—
Diameter
42.50mm
37mm
Thickness
13.30mm
10.95mm
Lug-to-Lug
50.40mm
44.6mm
Lug Width
22mm
19mm
Finish
Brushed and polished
—
Water Resistance
300m
50m
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
Miyota 9015
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 and date
Pricing
1 specsMSRP
$415
$3,900
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