Pony Express First Day Cover Color Slide, undated. Slide transparency of Pony Express mail covers donated by U.S. Philatelic Society in 1974.
Elliptical hand stamp: not described
Addressed to:
Miss Ella Magill
Mexico
Adrian Co., Mo.
Lexicon
LOC Thesaurus for Graphic Materials
Pony express
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Pony Express Stamp, Pony Express First Day Cover, United State Philatelic Society