16 inch/50 caliber M1919 gun
16 inch/50 caliber M1919 gun is a coastal artillery weapon or rifled breech loader.
Also recorded as 16 inch M1919 Coast Gun.
Overview
American coastal artillery.
In detail
It is associated with United States.
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
“16-inch/50-caliber M1919 gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2622829: 16 inch/50 caliber M1919 gun
Consult the source