Figural Native American Beaded Bag

How many beaded bags have you seen with an Indian with a tomahawk chasing a running cowboy. This is one fun bag.  It has "P. R. L." and "P O I" in large beaded letters on the back side. The bag is a large "U" shaped bag with 1 ½" wide fringe around three sides and is lined with white cloth. The colored beads are tiny and smaller than the white beads, the reds are white hearts, the yellows are greasy yellow and it is thread sewn. The mystery: who made it and what do the letters mean? 

L. 8"; W. 6"