Jerome Eisenberg, a leading New York antiquities dealer who guarded against the illegal importation and sale of ancient art, died on July 6, his 92nd birthday, in Manhattan.

Mr. Eisenberg started a mail order ancient coin business with his father when he was 12, and over the years sold an estimated 40,000 ancient artifacts and appraised countless others for prospective buyers and insurance adjusters. He also testified as an expert witness on the value and source of antiquities.

Often described in the press as the “dean of New York antiquities dealers,” Mr. Eisenberg founded the Royal-Athena Galleries in Manhattan in 1954, specializing in Classical Greek, Roman and Egyptian art. In 1970, he established Collector’s Cabinet, a natural history gallery featuring minerals, seashells, fossils and butterflies. He later expanded Royal-Athena, opening branches in Beverly Hills and London. He retired in 2020 and closed his galleries.