A slight surprize to find such a meter in Germany. Usually there are only few if the better HP / Fluke and the like used meters available in Europe and shipping from the US makes it quite expensve.
Here it looks like the other way around. Probably easier to sell in the US and a very limited market in Europe for a more collectable than usable meter, though the specs are not that bad.
Definitely an impressive meter for it's time.
At that age one may have to check if it contains a mercury reference cell, as shipping these is illigal with many carriers.