340 mm/28 Modèle 1881 gun
340 mm/28 Modèle 1881 gun is a naval artillery or rifled breech loader.
Also recorded as 340 mm/28 Modele 1881 gun.
Overview
French naval artillery.
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
“340mm/28 Modèle 1881 gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q4635319: 340 mm/28 Modèle 1881 gun
Consult the source