2c Red, Ty. IV (279B). Tied by "?-98 Philadelphia Pa. 10AM" oval emergency duplex datestamp device on small locally used cover, Very Fine -- this is an extremely rare example of the emergency hand-cancellers supplied by the Post Office Dept. and used briefly in early 1898, which were necessary due to overwhelming demand to replace worn-out devices and to supply new offices and military camps during the Spanish-American War -- an accompanying article by K. F. Olson identifies the oval as Type I

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