M1909/37
M1909/37 is a 122 mm howitzer or artillery model.
Also recorded as 122 mm howitzer M1909/37; M1909/37 Howitzer.
Overview
1930s towed 122 mm howitzer 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
“122 mm howitzer M1909/37”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1809269: M1909/37
Consult the source