Looking at purchasing a 1966 Dodge Panel Van

Seeing that it is a right hand driver's configuration I agree that it is probably one of a limited run of factory purpose-built utility type trucks manufactured overseas.

I remember seeing that type of utility vehicle in use by railroad workers, electrical linemen/riggers, and California Division of Forestry firefighters (known as Hotshots) in SoCal back in the 1960s. Some of them had windows and some of them didn't. I was a kid back then and I don't recall any specific automaker's trademark on any of them.