37 mm automatic air defense gun M1939
37 mm automatic air defense gun M1939 is an anti-aircraft gun or artillery model.
Also recorded as 61-K; M1939 AAG; M1939 anti-aircraft gun; 37 mm anti-aircraft gun M1939; M1939.
Overview
Anti-aircraft gun of Soviet origin.
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
“37 mm automatic air defense gun M1939 (61-K)”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q701703: 37 mm automatic air defense gun M1939
Consult the source