11 cent Air Mail Stamp Plate Block of Stamps

FIRST DAY OF ISSUE 119 AIR MAIL SERIES OF 1971 Art Craft PHILADELPHIA NEW YORK THE FINAL BRIEFING J. Lindsey FIRST GOVERNMENT AIR MAIL SERVICE-FROM WASHINGTON TO NEW YORK VIA PHILADELPHIA, MAY 15, 1918 43147. Nelson De-Ploria Ill POKAN 1971 WA NE 32941 US AIR MAIL 11¢ A! US MAIL 11¢ AIR FIRST DAY OF ISSUE USTUS MAIL 11¢ AIP MAIL 11¢