#C157-80 Footnote, 1956 6c-1B Pan-American Conference, imperforate, the complete set of all 24 values in horizontal pair, each with ample to large margins and very fresh, o.g., n.h., fine-very fine; only 50 sets of pairs were released and most of these were sold to delegates at the conference; each signed Paredes and Kessler (1966 Sanabria Cat. $200.00). (Image)

Est. $400-500