381 mm/50 Model 1934 gun
381 mm/50 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
“Cannone da 381/50 Ansaldo M1934”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3537989: 381 mm/50 Model 1934 gun
Consult the source