Lovely necklace signed "HK HANDMADE STERLING DENMARK" made of sterling and enamel. Although extremely rare to see his signature on non George Jensen pieces, it is probably made by Henning Koppel(1918-1982). In "Silver Jewelry" by Fred Rezazadeh, on page 100, it states that "Koppel's jewelry exhibits modern and abstract designs derived form nature, sometimes enhanced with enamelwork." It also shows that "HK" is Koppel's signature, aside from his work with Jensen. This bracelet is designed with black enamel swans set in silver and signed "HK", thereby, fulfilling the above definition of Koppel's style. The necklace is 15" long and each link measures 1" by 3/4". It is in excellent condition and made of good weight...$10 USA insured shipping.