320 mm Model 1934 gun
320 mm Model 1934 gun is a naval artillery or rifled breech loader.
Overview
Italian naval artillery.
In detail
It is associated with Italy.
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
“320 mm Model 1934 naval gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3559668: 320 mm Model 1934 gun
Consult the source