Vintage retro style 60's 70's Kate Spade Jewelry set - necklace and earrings

This set was purchased in the early 2000 and worn once for New Years eve. It is black enamel and gold plated. The necklace is quite long and the look is very late 60's early 70's. Length of necklace: 17.5 inches. Length of earrings: 2.5 inches. Please ask all questions before buying. Thank you!