AIR EXPRESS LABEL ON REVERSE-CLIFFORD BALL,INC-CLEVELAND,PITTSBURGH,WASHINGTON D.C. ROUTE-AAMC #17-Sc#681-WASHINGTON D.C.-TO PITTSBURGH PA-BACKSTAMPED-FLIGHT CACHET(green)-NEW KENSINGTON PA DEC/26/1929-SCARCE-minor toning/stain 81086
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