Famous American Series. (First Day Covers - The Scientists' Group) Eli Whitney, Samuel F. B. Morse, Cyrus H. McCormick, Elias Howe, Alexander Graham Bell.
1940. Scott 874-878. 5 uncacheted addressed First Day covers. The Scientists' Group,COMMEMORATIVE STAMPS—FAMOUS AMERICAN SERIES. Third Assistant Postmaster General, Washington, September 4, 1940. Supplementing prior notices, postmasters and employees of the Postal Service are hereby advised of the issuance of the Inventors' Group in this special series of postage stamps. Postmarked October 1940. From the collection of Frederick Langford. Item #59-3067
Price: $50.00
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