key bugle
key bugle is a keyed trumpet or wind instrument.
Also recorded as Kent bugle; Royal Kent bugle; keyed bugle.
Overview
Brass instrument with keys.
In detail
key bugle is a keyed trumpet or wind instrument.
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
“Keyed bugle”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1744357: key bugle
Consult the source