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