MP 34
MP 34 is a submachine gun or firearm model.
In detail
It is associated with Switzerland. The record gives 1929 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
“MP 34”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q644981: MP 34
Consult the source