Vintage Southwestern Sterling and Turquoise Ring with Pear Cut Stone SRI mark and 0925

This is a lovely vintage 40s sterling 0925 marked Southwestern style ring with a pear cut turquoise inset into the sterling base. It has a very unusual style of surround and it is signed on the back with what looks like SRI. Only the R is definite. It is a size 5 and I would call it a pinkie ring or a child's ring. It is in very good condition.