Old Pawn Zuni Inlayed Turquoise Oval Ring Size 5 Etched Band Unmarked

There's a nice heavy patina on this piece (can be easily polished if you prefer)- I estimate it's likely from the 1970s, and I'm leaning toward native, but it could have been made in Mexico. It's not signed or marked in any way. Size 5, split shank, with stamping on the band.