130 mm/50 B13 Pattern 1936 gun
130 mm/50 B13 Pattern 1936 gun is a naval artillery or rifled breech loader.
Also recorded as B-13.
Overview
Soviet naval gun.
In detail
It is associated with Soviet Union.
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
“130 mm/50 B13 Pattern 1936”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2469343: 130 mm/50 B13 Pattern 1936 gun
Consult the source