15¢ Brown & Blue, Type I (118), rich colors, attractive margins and centering, tied by "Washington D.C. Oct. 20" (1869) circular datestamp and by red "New York Paid All Br. Transit Oct. 21" circular datestamp on cover to Padua, Italy, clear strike of "U.S.N. Observatory, Washington Oct. 20, 1869" double-oval datestamp, receiving backstamps, opened a bit roughly at top, Very Fine, the United States Naval Observatory is one of the oldest scientific agencies in the United States, with a current primary mission to produce positioning, navigation and timing for the United States Navy and the United States Department of Defense, the use of this oval datestamp on an 1869 Pictorial Issue cover is most unusual

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