1c Brown on Buff, Postal Card (UX1; USPCC S1). Cancelled by partly clear strike of Boston May 13, 1873 First Day circular datestamp, matching segmented cork, notation at lower left "May 13th '73",

VERY FINE. A RARE BOSTON FIRST DAY USE OF THE FIRST POSTAL CARD ISSUE.

Fewer than ten cards are known to exist cancelled on May 13. They were postmarked in Boston, New York and Washington D.C. One is known cancelled on May 12 in Springfield Mass. (sent by an official of the Morgan Envelope Co.) but has never reached the market.

With 1992 P.F. certificate with the opinion "genuine usage of a postal card docketed May 13, 1873, with an undecipherable postmark" -- obviously it is May 13

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