Eunjangdo
Eunjangdo is a jangdo or weapon type.
Overview
Korean knife (personal dagger).
In detail
It is associated with Joseon.
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
“Eunjangdo”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q5409787: Eunjangdo
Consult the source