#121P, 1907 5c President Jose Medina plate proof in black on thin wove, sixteen sheets of 100 (10x10), minor selvage flaws due to storage, generally very fine.

Est. $400-500

#C241 Footnote, 1953 1c "ONU/X Aniversario/1945-1955" overprint on 1c Ultramarine and violet blue official, inverted overprint, o.g., n.h., extremely fine and very rare as only 25 copies were discovered; signed Kessler and Sanabria. (Image)

Est. $200-300