AIR EXPRESS LABEL ON REVERSE-CLIFFORD BALL,INC-CLEVELAND,PITTSBURGH,WASHINGTON D.C. ROUTE-AAMC #17b-Sc#681-PITTSBURGH PA-TO WASHINGTON D.C. DEC/26/1929-BACKSTAMPED-...FLIGHT POSTPONED...(violet)-FLIGHT CACHET(blue)-SCARCE-minor toning
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