
DuJay was founded in New York in 1934 by Jules Hirsch and Jacques H. The business was a division of Hirsch & Leff, makers of fine jewelry and although there is not much information regarding when they went out of business, it is believed that they made jewelry until the 1970s. The company valued quality over quantity. Their jewelry is considered to be rare today, and it is among the best of the best in terms of attention to detail with beautiful craftsmanship using high-quality material.
Most of the earliest and most valuable pieces of DuJay were unmarked.