Vintage Stamped 1/20 12K GF Open Filigree Heart Brooch Pin Excel Cond

Vintage Tiny Gold-Plated Open-Filigree Heart Pin Brooch 1/20 12K G. F. Father purchased for mother for Valentine's in late 60s (68 or 69). Price was a rough estimate given from a NYC jeweler. The heart is raised with a filigree design along it edges. Sturdy pin. Pin is straight.. not bent. There is a 1/2 inch safety clasp on the back. Signed/stamped 1/20 12K GF (see picture) Measures approximately 1 1/8" x 1"