- Deutsche Zündwaren-Monopolgesellschaft
with a hyphen. Please see the links from warmweer.
I am not aware of a longer designation in the German language. Apart from the fact that there are very long designations for ministries and/or names.
- Zündwaren-Monopolgesellschaft
It is already unique, at least I think so.
When we type this designation in morse code, we actually get cramps in our index finger.
And I wonder which pilot and air traffic controller can spell this designation using the *pilot alphabet. After all, the pilot alphabet is in english.
Then I'd better play Monopoly and buy the Schlossallee.
Monopoly:
https://de.wikipedia.org/wiki/Monopoly
--> https://de.wikipedia.org/wiki/Monopoly#Das_Spielfeld
--> shows
German basic version
Austrian basic version
Swiss basic version and
basic version in the USA
https://en.wikipedia.org/wiki/Monopoly_(game)
Monopoly makes *Victor India Echo Lima Sierra Papa Alfa Sierra Sierra.
-> in deutscher Sprache: VIEL SPASS (Viel Spaß) 
