CANAL ZONE, 1907-08, 1c, 5c, 10c Provisional Postage Dues (22 var, 24 var, 26 var). Three items, first is 1907 cover from Grenada to Pedro Miguel P.O. in Canal Zone bearing 1c Grenada stamp plus 1c and 5c Canal Zone stamps with "Postage Due" precancel handstamps and "Postage Due 6 Cts." marking, second is off-cover 10c with similar precancel handstamp, third is 1907 cover from Pedro Miguel with Nos. 22-26 and signed by Gerald Bliss, Very Fine and scarce group, these Postage Due precancels were prepared by Bliss for use on incoming mail into the Canal Zone in 1907 and 1908

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