Nkm wz.38 FK
Nkm wz.38 FK is a heavy machine gun or anti-aircraft gun.
Overview
Polish anti-air and anti-tank heavy machine gun/autocannon.
In detail
It is associated with Poland.
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
“Nkm wz. 38 FK”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q6119552: Nkm wz.38 FK
Consult the source