@Otti:
That is a "Golf Van", also known as "Golf Stadtlieferwagen".
In some countries like GB, NL, B, A, and probably DK and some more,
the taxes were much lower, if you bought a 2 seater "panel van" instead of a usual car.
The Van had two seats, metal window panels and "Ladekantenbleche".
The "Stadtlieferwagen" for Austria had a interior divider with a net, the "Van" had a simple wooden divider only.
The Van had only the two weakest engines (petrol/diesel), the Stadtlieferwagen got up to 70hp.
No Golf for the german Postal Service or Telecom had those metal windows or the taillights without reversing lights while in service.
But you could save taxes in germany too, if you welded the side windows in your car and register it as van, until a few years ago.
So many owners did that.
The "Stadtlieferwagen" / "Van" were available as Golf Mk2, and some other older & newer VWs as well.




@Tjaap:
Yes, they were unsure where to place the front lights...
Fortunately they fixed that - and the smallest rear lights, too.