BIRD Shape Sand Painting signed Bingo Smith Navajo Trinket Box Native American

Extremely rare signed Bird shaped trinket box signed by Navajo Artist B (Bingo) Smith. I do not see any other trinket boxes he has done. There is rub off to sand as can be anticipated with Sand Painting art, especially over a shiny surface such as this. Base is ceramic and probaby a molded piece decorated by the artist. Dimensions/approx: 4.5" wide 2.5" deep 1.5" high