For your consideration is this very pretty Native American pin. It has a very clean robin's egg turquoise center stone and beautiful stampings. Signed WS Sterling. My research shows that Willie Shaw and Willie Saiz of the Navajo tribe used this mark.
It measures 1 and 1/2 by 1 and 1/4 inch.
it is in excellent functioning condition . It does have an uneven patina. Please ignore shadows and color reflections.