Minenwerfer
Minenwerfer is a short-barreled mortar or artillery model.
Also recorded as Mine Launcher.
Overview
German mortar family.
In detail
It is associated with Germany.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Minenwerfer”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1639569: Minenwerfer
Consult the source