25 C.F.R. § 304.5 Dies to identify tribe.
Title 25 - Indians
Dies are marked with name of tribe. A Navajo stamp will be used where the marker is a Navajo Indian; similarly, for Zuni, Hopi, and Rio Grande Pueblo.
Title 25: Indians
PART 304—NAVAJO, PUEBLO, AND HOPI SILVER, USE OF GOVERNMENT MARK
§ 304.5 Dies to identify tribe.