Mark 37 torpedo
Mark 37 torpedo is an acoustic torpedo or torpedo model.
In detail
It is associated with United States.
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
“Mark 37 torpedo”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1899848: Mark 37 torpedo
Consult the source