ZB-53
ZB-53 is a medium machine gun or firearm model.
Also recorded as ZB53; TK vz. 37; VZ37; MG 37(t); MG37T.
In detail
It is associated with Czechoslovakia. The record gives 1936 as its date of establishment or first appearance.
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
“ZB vz. 37”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q135956: ZB-53
Consult the source