SNH

In Germany the licence plates all start with a set of characters, indicating the district where the vehicle is registered (with some exceptions for special groups, like police, army, etc.). My car has DA, for district Darmstadt-Dieburg.

This trailer (or was it a pickup truck?) has SNH. Never heard about that, so I asked Mr. Google. SNH stands for Sinsheim (halfway between Heidelberg and Heilbronn). Licence plates with these characters have not been issued anymore since 1973. It will have been in use after that date, but is still pretty old. 47 years at least.

By the way, Magirus-Deutz never built small trucks. Only after Magirus-Deutz became part of Iveco in November 1975 they produced small trucks.
Meiller still exists, you can see new dump trucks on the street.

Thanks to Marlieske for hosting the derelict challenge.