QF 4.7 inch Mk XI gun
QF 4.7 inch Mk XI gun is a quick-firing gun or naval artillery.
Overview
British naval dual purpose gun.
In detail
It is associated with United Kingdom.
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
“QF 4.7-inch Mk XI naval gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2121206: QF 4.7 inch Mk XI gun
Consult the source