This item is an authentic antique 12 k gold-filled "Carmen" sweetheart expansion bracelet, manufactured by the D.F. Briggs Company (marked as The D.F.B. Co.). Because it features the "D.F.B. Co." stamp, this specific bracelet was manufactured between 1900 and 1922, making it over 100 years old. In 1922, the company officially changed its name to Briggs, Bates & Bacon, dropping the D.F.B. mark. Markings Deconstruction "The D.F.B. Co." / "Carmen": The D.F. Briggs Company of Attleboro, Massachusetts, patented this specific "S-link" expansion design. The owner named the popular bracelet line "Carmen" after his daughter. "3x6": This is a manufacturing size code specifically designating a children's or youth size. In its unexpanded state, it is designed for a very small wrist. "Made in the USA": Verifies its production origin in the historic jewelry-making hub of Attleboro