Papercu,
a great info. I do not remenber trucks in the early seventies with only stars on the doors. I remember them with a star on the hood and nothing on the doors. Especially in Wildflecken. They painted over the stars with camo colour due to the danger of the Russian snipers. And Wildflecken was very close to the border. The shades of the overpainted stars were present.
Sorry, I do not have pics of these trucks, I had no camera by that time.
But for example in the Mannheim-Heidelberg area they probably did the marking that way. However, I realy do not remenber that. The units did many things their own way. Also the literature is limited in this aspect...hight of vision....
However, here in Germany, everything in marking by that time was correct regardless the official requirements.
The late 60's and the 70's were also the hight time of personal modifications of the trucks due to unit needs. Everything is / was correct.
I have seen trucks which locked from the outside like a M109. Inside it was a motor home. Or M35 with playwood bodies built to the requirements, as well as on 5 ton trucks. Including air conditioner with power pack beside it...
This is something like in the German Army in WWII. Modification of the equipment was illegal, but everybody did it.
(And in the German Army, when I served there, it was the same.)
Wolf