Roman tuba
Roman tuba is an end-blown straight labrosone or music of ancient Rome.
Overview
Ancient Roman military signal trumpet.
In detail
Materials recorded for it are Metal.
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
“Roman tuba”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2030802: Roman tuba
Consult the source