330 mm/50 Mle 1931
330 mm/50 Mle 1931 is a 13 inch naval gun or rifled breech loader.
Also recorded as 330 mm/50 Modele 1931 gun; 330mm/50 Modèle 1931 gun; 330L50 Mle 1931.
Overview
French naval gun model.
In detail
It is associated with France.
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
“330mm/50 Modèle 1931 gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q4030925: 330 mm/50 Mle 1931
Consult the source