Solid one piece metal casting or blank (sheet punch). Filing marks visible, but gold color fills all spaces.
Search ref.: "cockerel" "un coq" "le coq" "rooster", and just in case "peacock" all [in rectangle] [in square] {"Number 68", "No. 68", "#68"}
Given that this could be a partial of a plater's mark, some Gallia marks showing difference in both of these left birds with raised foot:
http://www.ascasonline.org/windowottob77.html
All very trying since only reference found for use of the number 68 is a French Bureaux (Office) listing regarding assayance of precious metal.