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.
source: The provisions of this part 304 contained in regulations governing use of Government mark on Navajo, Pueblo, and Hopi silver, April 2, 1937, unless otherwise noted.
cite as: 25 CFR 304.5