Roy Manuelito and his wife Allison are Navajo silversmiths who make barrettes. Each produces under his/her own hallmark.
This is a Sterling sheet cut-out barrette. The form of the barrette is first cut from the silver sheet and then the stampwork is added, the sheet silver domed and buffed to a high shine. Closure on back is the standard French-manufactured pressure-hinge mechanism. Width between the hinges (where the hair fits) is 2".
No visible hallmark on this piece (it's probably hidden by the clasp), but clearly marked Sterling.
Dimensions: 3 1/4" x 1"