Interphil76 Block of Stamps

Art Craft IN CONGRESS, JULY 4, 1776 Cohe unanimous Declaration States of America. ROCKAND CRTER IN PHILAGA BYORDER AND S Whap Interphil76 FIRST DAY COVER OFFICIAL AUTHORIZED BY SEVENTH USA INTERNATIONAL PHILATELIC EXHIBITION PHILADE PHIA, A JAN. 17 1976 19104 Interphil Interphil 75 PHILATELIC EXHIBITION PHILADELPHIA, PENNSYLVANIA MAY 29-JUNE 6 LUSA13 FIRST DAY OF ISSUE Interphil Interphil PHILATELIC EXHIBITION PHILATELIC EXHIBITION PHILADELPHIA, PENNSYLVANIA MAY 29-JUNE 6 USA13c PHILADELPHIA PENNSYLVANIA MAY 29-JUNE 6 USA13c CCCCCCC PHILATELIC EXHIBITION PHILADELPHIA. PENNSYLVANIA MAY 29-JUNE 6 USA13c