M1938
M1938 is a 107 mm mortar or artillery model.
Also recorded as 107mm M1938 mortar; 107 mm mortar M1938.
Overview
1930s portable 107 mm mortar 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
“107mm M1938 mortar”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3278125: M1938
Consult the source