Beautiful Vintage Amber Crystal, Neck & Earrings

Beautiful vintage amber crystal necklace white stones alternating between the larger ones , three strand , matching clip back earrings still in original box from a family estate who kept everything as purchased. The picture doesn't do this set justice its gorgeous nice heavy beads with an older smaller style clasp I'm guessing 50's or sixties. Marking on back of inside of box but not sure if the stores or the manufacturers could not find any marking on the set.
Any questions feel free to ask before bidding, I describe items to the best of my ability.