Side by side
Lum-Tec B68 Day DatevsLongines PRIMALUNA
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
22 of 29 specs differDiameter
B68 Day Date44mm
PRIMALUNA30mm
Power Reserve
B68 Day Date40h
PRIMALUNA40h
Water Resistance
B68 Day Date200m
PRIMALUNA30m
MSRP
B68 Day Date$595
PRIMALUNA$1,950
Full specifications
Case
9 specsCategory
Sport
Dress
Diameter
44mm
30mm
Thickness
—
8.3mm
Lug-to-Lug
51.5mm
37mm
Lug Width
22mm
7mm
Material
316L Stainless Steel (DLC coated)
Stainless Steel
Finish
Brushed and polished
—
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal
Crystal & Dial
6 specsCrystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
—
AR Coating
Inner
Both sides
Dial Color
B68 Day Date
Blue
Indices
Applied
Diamond indexes
Lume
None
Super-LumiNova
Movement
6 specsCaliber
Ronda 515
L257.2
Beat Rate
28,800 vph
25,200 vph
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date
Pricing
1 specsMSRP
$595
$1,950
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