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Details
cover UNITED STATES POST OFFICE: 1890 (27 June) opened-out envelope (soiled) to New York bearing U.S. 5c. blue tied by barred cancellation and showing a good strike of the double-oval "U.S. POSTAL AGENCY/SHANGHAI" datestamp in purple, the reverse with faint "SHANGHAI/LOCAL POST" c.d.s. with San Francisco and New York transit c.d.s.