Škoda A7
Škoda A7 is a tank gun or 37 mm gun.
Also recorded as Skoda 37 mm A7; 3,7cm UV vz. 38; 3.7 cm A7; 3.7 cm vz. 38; A7; 3,7cm ÚV vz. 38.
In detail
It is associated with Czechoslovakia.
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
“3.7 cm ÚV vz. 38”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2576412: Škoda A7
Consult the source