Large Spider Web Turquoise Navajo Ring Size 11 1/2

Vintage large turquoise ring set with spiderweb turquoise. The stone is set in a sawtooth bezel and is surrounded with a row of raindrops. 

Size 11 1/2 and the face measures 1 5/8" by 1 1/4". It has an old sticker on the back that I cannot make out. Might the the artist name. I did not want to remove it, Not sure what is under it, a hallmark or nothing? Weight: 24.1 grams. C. late 1970s. 

This is from the Frank Gingerich estate.