10c Green, Ty. I (13). Three large margins, in at bottom but type characteristic still present, pretty shade, neat strike of U.S. Express Mail, Boston route agent's circular datestamp, vertical crease at left and light corner crease at bottom left, Fine appearance, this is reported to be the only known example of the U.S. Express Mail cancel on Scott No. 13, ex Wagshal, with 1968 P.F. certificate, this cancel is listed but unpriced in Scott, Scott value as normal cancel

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