Vintage Stick Pins “N” Initial, Double Heart & Circle - Ying & Yang Symbol?

Vintage stock pins. Selling all three together. The double heart pin has a makers mark of an N on the back. Might be made by Napier? These are not all the same size. See picture next to ruler. These are older and may show signs of age, use and storage. “N” initial, monogram pin Circle - Ying and Yang Pin Double heart pin with Rhinestone accents. All in goldtone metal My guess these date to the 1970’s - 1980’s