GJ.641, 1928 24c. Condor, block of 20 with 3 interesting VARIETIES: "First A of SOBRETASA with white shadow", "AEREO with accent" and "spot in the left border", very fine quality! (Image)

GJ.648H, 1928 Condor 72c., block of 6 printed on DUTCH paper, one with "SERVICIQ" variety (position 35), very fine quality! (Image)

UNKNOWN VARIETY: GJ.650, 1929 1P. with PARTIAL DOUBLE IMPRESSION in the bottom part, used, excellent and the only one that I have every seen! (Image)

GJ.652H, 1928 1.26P. printed on DUTCH PAPER, not yet catalogued, very fine quality! (Image)

GJ.1109P, 1958 Centenary of Confederation stamp (horses, gauchos, guitar, etc), IMPERFORATE PAIR, very fine quality! (Image)

GJ.1114P, 1958 Port of Buenos Aires, Centenary of Buenos Aires stamp, IMPERFORATE PAIR, VF quality! (Image)

GJ.1239P, 1962 Postman Day, 3 IMPERFORATE BLOCKS OF 4 in different colors (trial color proofs), MNH and of excellent quality, very rare group! (Image)

GJ.1242P, 1962 UPAEP 50 years, 4 IMPERFORATE BLOCKS OF 4 in different colors (trial color proofs), MNH and of excellent quality, very rare group! (Image)