Side by side

Lum-Tec B66 Day DatevsSpinnaker Dumas GMT

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
Dumas GMT
SpinnakerDumas GMT
MSRP $399

At a glance

9 of 29 specs differ
Diameter
B66 Day Date44mm
Dumas GMT44mm
Power Reserve
B66 Day Date40h
Dumas GMT40h
Water Resistance
B66 Day Date100m
Dumas GMT300m
MSRP
B66 Day Date$545
Dumas GMT$399

Full specifications

Case

5 specs
Category
Sport
GMT
Thickness
—
15mm
Lug-to-Lug
51.5mm
48mm
Material
Titanium (DLC coated)
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

2 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
Standard
Blue

Movement

1 specs
Caliber
—
Seiko NH34A

Pricing

1 specs
MSRP
$545
$399

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