20 mm modèle F2 gun
20 mm modèle F2 gun is an autocannon or anti-aircraft gun.
Overview
French naval gun.
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
“20 mm modèle F2 gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q4630632: 20 mm modèle F2 gun
Consult the source