is it some kind of option?
I saw a photo of a '48 Chev Fleetline.
It has a large tube on the top of the passenger window.
What is it?
Yes it was an option, it is an early air cooler that used water to cool the air incoming in the vehicle, they worked as long as it wasn't really hot and dry.
It was a rocket launcher. What does he know? ;)
Rocket launcher? Sorry even back then you couldn't use civilians vehicles as a military weapon.
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