Vintage 1950s 12k GF Gold Filled Oval Black Onyx Pendant Necklace Dainty 1/20 12k GF Chain
Chain measures approximately 18.25 inches long and has a spring ring clasp.
Pendant measures approximately 1 inch long (including bail) by 0.45 inch wide.
Chain clasp is marked 1/20 12k GF. Back of pendant and bail are also both marked 12k GF.