Very Old Crescent Moon Rhinestone Pin Brooch

I think this is quite a bit older than most rhinestone pins that you see. Purchased from the estate of a woman who we were told traveled all over the world with the USO. Stones appear to be foil backed and are all prong set and appear to be all original to the piece. Setting appears to be stamped brass plated with something, perhaps rhodium. Stones are much brighter than they appear in our photo. Measures approx 1 3/4" x 1 1/2". Very good vintage condition.