Hi Pal:
A bit late for you tonight, but some observations and a question to try to cut down on research time.
Thanks to your websites and others, one can get a good handle on Hungarian vehicles and coach builders.
That has lead me to view that which I was not aware of before, the strength of Hungarian commercial vehicle imports. Both, during the "Cold War" period to various Soviet Union affiliated countries, and afterwards to countries like Syria, Turkey and Iran in the "After Cold War but we still do not like the West" period.
My "clue" question is, was this vehicle exported to or bodied in one of those two "Cold War" scenario countries. I hope that is not too many questions.
Bill