Well...you all know that I love buttons. I found this information in the Arizona Collectors Guide Calendar.
Morning Star Traders
2020 E. Speedway Blvd., Tucson, Arizona
520-881-2112
Navajo Button Exhibit - Historic Navajo & Pueblo button collection which consists of over 1000 buttons.
The collection began in 1931. Some of the buttons date as early as the mid 1800's.
Many of the early pieces were made into buttons out of Mexican and American silver coins. Each button can stand alone as a piece of artwork.
The photo was taken from a the southwest site as I was unable to find one for this show.
http://southwestcrossroads.org/