Stephen Koschal ~ Quality Autographs & Signed Books Serving Collectors, Libraries, Institutions, Autograph Galleries and Dealers with Autographs and Signed Books in all Fields of Collecting Since 1967. 7155 Sand Crest View, Colorado Springs, CO 80923 USA ~ Phone (561) 315-3622 ~ skoschal@aol.com

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SALK, Jonas (1914-1995). SABIN, Albert B. (1906-1993) Both men were pioneers in developing vaccines against polio. First Day of issue cover commemorating The National Foundation for Infantile Paralysis, Twentieth Anniversary. Affixed to this cover is a U.S. 3 cent stamp Honoring Those Who Helped Fight Polio. Cancelled First Day of Issue Washington D.C. Jan 15, 1957. Signed by both Salk and Sabin. A fine cover...............$275.00

Stephen Koschal ~ Quality Autographs & Signed Books Serving Collectors, Libraries, Institutions, Autograph Galleries and Dealers with Autographs and Signed Books in all Fields of Collecting Since 1967. 7155 Sand Crest View, Colorado Springs, CO 80923 USA ~ Phone (561) 315-3622 ~ skoschal@aol.com