Vintage Nemadji vase. Rare and beautiful

Lovely piece of Nemadji Pottery, with swirls of green, orange, and brown. Vessel has an unglazed exterior and glazed interior. No chips, visible scuffs or cracks. Marking on bottom is reads "Nemadji Pottery" with a drawing in the middle. and Nevada. Please see all photos. Dating this to the 1970's, based on what I can see of the marking, but I may be off. Measures 4.5" H x 5.5" W at widest point; opening is ~3" W.