Side by side

Lum-Tec B66 Day DatevsSpinnaker Cahill Automatic

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

B66 Day Date
Lum-TecB66 Day Date
MSRP $545
Cahill Automatic
SpinnakerCahill Automatic
MSRP $350

At a glance

10 of 29 specs differ
Diameter
B66 Day Date44mm
Cahill Automatic42mm
Power Reserve
B66 Day Date40h
Cahill Automatic40h
Water Resistance
B66 Day Date100m
Cahill Automatic200m
MSRP
B66 Day Date$545
Cahill Automatic$350

Full specifications

Case

6 specs
Category
Sport
Diver
Diameter
44mm
42mm
Thickness
—
13.7mm
Lug-to-Lug
51.5mm
51mm
Material
Titanium (DLC coated)
316L Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

2 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
Standard
Green

Movement

1 specs
Caliber
—
SII NH35A

Pricing

1 specs
MSRP
$545
$350

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