Found this on the internet which really doesn't answer the question.
GIVENCHY: 1950 - Present
Hubert de Givenchy was born in France in 1927 and at the age of 17, started his designing career in Parisian fashions with Jacques Fath, then working for Piquet and Lucien Delong and Elsa Sciaiparelli. In 1952, Givenchy opened his own boutique featuring clothing and accessories including jewelry that were sold by department and jewelry stores and worldwide through high novelty boutiques. Some Givenchy jewelry of heavyweight gold and silver metals is of simple chain design with pendants. Others, is of high quality designs, made with heavyweight gold and silver plated metals, rhinestones, glass, Lucite, and plastic beads and faux pearls. A limited amount of designer pieces were made in his early years in business. Givenchy marked a logo on his jewelry, sometimes stamped "GIVENCHY" in the metal of the piece or marked with a "G" metal on both clasps, or a stamp on the metal with "4 G’s" in a box, or stamped in metal "Paris New York Givenchy" and "Givenchy Paris New York Date". Through the years, his designs are high quality accented with brilliant primary color rhinestones, glass, Lucite and plastic beads and faux pearls. Givenchy retired in 1995 and the business was taken over by John Galliano. The Givenchy Company was later acquired by the Victoria & Co. Ltd., a leading worldwide marketer and manufacturer of designer jewelry brands in the U.S. and key global markets. That company, as of July 2000, has now been taken over by the Jones Apparel Group. The Givenchy label is still on the jewelry produced that is sold in fine department stores. The jewelry is still known for its superb designs and craftsmanship, some with more affordable prices using cheaper materials and stones and others of outstanding designs with higher prices using quality stones and materials.
