Vintage 14K or 12K gold filled locket necklace, heart shaped

Vintage heart shaped locket necklace. Gold filled with either 12 karat, or 14 karat gold (the mostly commonly used options back in the day). Stamped Gold Filled and B. 16" chain, 0.75" pendant (with bail). Some scratches on the pendant, mostly on the back, as pictured. Also a few scratches on the clasp. Otherwise in very good condition. Gold filled vintage jewelry is considered valuable and collectible as it tends to be of better quality and also contains quite a bit of gold.