Danish Modern Necklace No. 5 by BentK with Amethyst . This sterling silver and amethyst necklace crafted by BENT KNUDSEN (1924 – 1996) is circa 1960. This neckcollar is sculptured to fit around the neck. The necklace measures approximately .5 inchwide and approximately 6 by 5.5 inches in circumference. The necklace bears impressed company marks for STERLING, DENMARK, BENTK, 5. This necklace is in excellent condition.