Side by side
Lum-Tec B68 Day DatevsSpinnaker Challenger Automatic
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
B68 Day Date44mm
Challenger Automatic42mm
Power Reserve
B68 Day Date40h
Challenger Automatic40h
Water Resistance
B68 Day Date200m
Challenger Automatic200m
MSRP
B68 Day Date$595
Challenger Automatic$289
Full specifications
Case
5 specsCategory
Sport
Diver
Diameter
44mm
42mm
Thickness
—
19mm
Lug-to-Lug
51.5mm
49.5mm
Material
316L Stainless Steel (DLC coated)
316L Stainless Steel
Crystal & Dial
2 specsCrystal
Domed Sapphire
Sapphire
Dial Color
B68 Day Date
Blue
Movement
2 specsCaliber
Ronda 515
SII NH35A
Type
Quartz
Automatic
Pricing
1 specsMSRP
$595
$289
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