RARE 1933 Old Pawn Navajo Silver Conchos

RARE c. 1933-34 Set of 8 conchos (BUCKLE NOT AVAILABLE), purchased by my grandmother from a SW trading post while on a college field archeology trip to Chaco Canyon near Santa Fe, New Mexico, in Spring 1934. All hand-made, hand-stamped. Heavy grade silver, copper loops brazed to back. You will need a professional to attest to the type/quality of the turquoise - I was told it is high-quality and rare.

8 Conchos, each measure 2-3/4" wide X 2" high, each about 1 oz. They would go on a 3/4" (skinny) belt.
I WILL CONSIDER SPLITTING THE LOT into two groups of four, message me.

At this time, silver artisans did not sign or initial their art. I do not have any receipt or documentation, just her memories telling me of the trip, and a photo of a co-student wearing one bought at the same time/place. I had the items validated by Native artisans at the marketplace event at the Autry Museum in L.A.