Vintage Native American Navajo Sterling Turquoise Kachina Ring Signed 7.5

Amazing sterling Kachina ring in pristine condition from the 1970's Stamped sterling and hallmarked "O". I believe this is the Hallmark of Orville Manygoats but the M may have been cut to form the side of the ring. The ring is large but weighs 4.4 grams so it is comfortable to wear. Please feel free to ask as many questions as you like.