Granatenwerfer 69
Granatenwerfer 69 is a mortar or artillery model.
Also recorded as 21 cm Granatenwerfer 69; GrW 69; GRW69; Elefant; 210 mm mortar GrW 69.
Overview
1940s portable 210 mm mortar of Germany.
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
“21 cm GrW 69”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q711566: Granatenwerfer 69
Consult the source