GJ.569EV, 1923 12c. San Martín with period, block of 4 WITH VERTICAL GUTTER, excellent quality, GJ catalog value US$250. (Image)

GJ.657/9 (Sc.371/3), 1929 Discovery of America by Columbus, set of 3 values in blocks of 4, excellent quality, GJ catalog value US$60. (Image)

GJ.374/386, 1930 Revolution, the set in mint blocks of 4 up to 50c., VF quality, catalog value US$216+ (Image)

GJ.817 (Sc.453), 1936 Interamerican Conference for the Maintenance of Peace, on a cover with printed head of the Conference, and special cancel of 18/DE/1936, VF quality, rare! (Image)

GJ.836/838, 1939 Fonopost, cmpl. set of 3 values in blocks of 4 of VF quality, 2 stamps in each block are MNH (+100%) and the other 2 are very lightly hinged, very fresh and attractive, catalog value US$450 (Image)

GJ.899 (Sc.509a), on a cover sent from Buenos Aires to Córdoba, the cancel with text about "Movement of June 4", interesting! (Image)

GJ.1050CJ, 3P. Nihuil dam, WITH LABEL BELOW, mint no gum, VF quality, very rare! (Image)

GJ.1102P/3P (Sc.671/2), 1958 Locomotive and airplane, Argentine-Bolivian friendship, IMPERFORATE PAIRS, excellent quality, GJ catalog value US$80. (Image)

GJ.1103P (Sc.672), 1958 Airplane flying over Argentina and Bolivia, IMPERFORATE BLOCK OF 4, little defect, very nice appeal, GJ catalog value US$80. (Image)

GJ.1231, 1962 Mounted soldier, corner block of 15 (lower right) with variety: DOUBLE IMPRESSION, ONE ON BACK ON GUM. An extremely rare piece, on back several stamps with offset impression (in negative) and 5 with positve partial or complete offset impression, unique, great rarity! (Image)

GJ.1259b (Sc.B43a), 1963 Sports (equestrian), with JACKET OMITTED variety, VF! (Image)

GJ.1852P, 1979 Guillermo Brown, IMPERFORATE PAIR, excellent quality, rare! (Image)