RS108P3 Helmbold’s Genuine Preparations Plate Proof Margin Block of 4
Henry T. Helmbold began his career in the patent medicine business in 1846 with Helmbold’s Extract Buchu and other medicines. Henry T. retired in 1876 and his son Albert L. Helmbold took over the business. He had the dies of two of the stamps altered to reflect his ownership. These stamps were issued from 1876 to April of 1882.