Indeed that one. I don't know where actually is Buchten, but in the picture you can clearly read that the address of BUCA is indicated to be in Buchten (L), so I'm quite convinced that other there are two Buchten, or at the time the truck was build that town was in Luxembourg. I've found other two pictures of trucks bodied by BUCA, and they show the same geographycal indication.
A point for you.