M1894 210mm Belgian mortar
M1894 210mm Belgian mortar is a mortar or artillery model.
Overview
Heavy mortar.
In detail
It is associated with Belgium.
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 Mörser M1880”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q769336: M1894 210mm Belgian mortar
Consult the source