Wirbelwind
Wirbelwind is a Flakpanzer IV or self-propelled anti-aircraft gun.
Also recorded as Flakpanzer IV/2cm Vierling; Flakvierling 38 on Flakpanzer IV; 20 mm Quad on Flakpanzer IV.
Overview
1944 German self-propelled anti-aircraft gun.
In detail
It is associated with Nazi 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
“Wirbelwind”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q697634: Wirbelwind
Consult the source