Vintage Courtship Cultured Pearl Strand Necklace 10 kt Clasp with 14 kt Earrings

Pretty set that comes in the original box. The set belonged to my grandmother so it does have quite a bit of age to it. The exact age is unknown. The box it comes in states, "Elegance of Cultured Pearls by Courtship". The pearls are in nice shape but since the box is extremely old, it has wear. The necklace is knotted and there are 57 pearls. Each pearl measures about 4mm wide. The clasp at the end is marked 10 kc which is 10 kt white gold. The necklace measures about 16". The pearls are all in nice shape with no pitting. Minor wear is noted. The clip on earrings probably does not go with the necklace. Since I found them both in the same box, I would imagine my grandmother thought they did. The earrings have a single pearl on them and is marked on the back, 14 kt. They are a little more darker with a gray tone to them vs the necklace. The pearl in the earring measures about 6 mm so it is larger than the pearls found in the necklace. The backs of the earrings screw on.