Sterling Silver and Glass Crystal Concho Necklace Vintage

Vintage sterling silver rattail chain necklace. It has three concho pendants with faceted glass crystal drops. The conchos do not have Native American stamping and I am sure that this piece is not NA. Necklace is 17 1/2" long. the J clasp does not lock. Pendants are 2 1/2" and 2 1/8" long. total weight: 36.2 grams.