Vintage Copper Prong Sew On Setting SS40 or SS41 8.5mm Prong Finding (6 pcs)

Vintage copper prong setting sew on cup base for an SS40 or SS41 or 8 or 8.5mm rhinestone. They have no loop and an open back, they were used by sewing the setting onto a garment with the thread in the channels, then setting the stone and folding the prongs over. Made in the USA for the jewelry trade circa 1930's. These are hard to get hard to find older copper settings. Qty of 1 = 6 prong settings EQ154