18K MERRIN CUFFLINKS AND STUDS: This 5-piece suite is handsome and simple in yellow gold with asymmetrical bars framing a black star sapphire. Pair of cufflinks marked 18K and Merrin feature 6.5mm black star sapphire with total weight of 13.5 grams. 3 sliding shirt studs are marked Merrin and 18k on the back of the front facing design that also features black star sapphires. The shanks are stamped 14k. Total weight of studs is 7.6 grams. Joseph Merrin moved to America from Ukraine as a teenager in 1917. He began working as a jewelers apprentice that year, and he opened his own store in 1927. In 1975, he made his move to the famed Fifth Avenue. His store was right across from where Trump Tower is now.