GJ.35, with "Admon. de Correos de PILAR" double circle cancel (reconstructed) without date, reference piece, superb! (Image)

GJ.35, with rococo cancel (reconstructed) of JACHAL, extremely rare, excellent! (Image)

GJ.47, 1877 provisional of 8c. on fragment, cancelled Concordia 2/MAY/1877, excellent quality! (Image)

GJ.54B, 1877 8c. Rivadavia type II (open frame) and carmine color, fantastic block of 4 (top stamps mint, bottom stamps MNH), excellent quality (rare in such fine condition) (Image)

GJ.108A, 1889 Sarmiento 6c. indigo blue (rare), with PAPER FOLD variety, VF. Value of a normal stamp US$60, good opportunity! (Image)

GJ.118, 1889 20P. Brown, used, excellent quality! (Image)

GJ.344, 1912 12c. Plowman, proof in the issued color, imperforate block of 4 printed on paper glazed on both sides, VF and rare! (Image)

GJ.414/422, 1916 Centenary of Independence, the 9 high values of the set postally used, very fine quality! (Image)

GJ.423P, 1917 ½c. San Martín, IMPERFORATE PAIR, MNH (+50%) (Image)

GJ.424P, 1917 1c. San Martín, IMPERFORATE PAIR, MNH (+50%) (Image)

GJ.536, corner block of 4 printed on multiple paper folds that produce a unique appearance, fantastic! (Image)

GJ.539, 2 examples used in different cities, one on fragment, with similar VARIETY: "Top part of the stamp completely blurred and illegible", excellent lot! (Image)

GJ.541CD, 1922 5c. Postal Congress with watermark printed on front, pair with right LABELS and with a SECOND INVERTED IMPRESSION, faint, it can only be seen in the labels (because they are blank) producing a tete-beche pair, extremely rare! (Image)

GJ.689CJ, 1930 1P. Revolution WITH LABEL BELOW, very fine quality, extremely rare! (Image)

GJ.761, 1P. Map without borders, PROOF in the issued colors, imperforate pair printed on thick paper of glazed front, very nice! (Image)

GJ.762, 2P. Fruit, printed on "PAPEL TELA" (Pettigiani 762-E), MNH block of 4 (+30%), very fine quality, Pettigiani catalog value US$182, low start! (Image)

GJ.764AP, 10P. Grapes (wine), IMPERFORATE PAIR, MNH (+30%), excellent! (Image)

GJ.796, 10c. Rivadavia typographed type I, MNH block of 4 (+30%), the bottom stamps with varieties: "White spots on the jacket", value of a "normal" block US$41+, low start! (Image)

GJ.797, 10c. Rivadavia, pair with LARGE PRINTING FLAW on the left stamp, excellent and unique! (Image)

GJ.806a, Alberdi 6c. without watermark, pair with DOUBLE IMPRESSION variety, used, very scarce, excellent! (Image)

GJ.873P, 1942/52 20c. Bull, IMPERF BLOCK OF 4, 3 stamps MNH and one with tiny hinge mark, VF quality! (Image)

GJ.874H, 1942/52 20c. Bull printed on DUTCH PAPER, MNH corner block of 4, very scarce! (Image)

GJ.874H, 1942/52 20c. Bull printed on DUTCH PAPER, MNH, very scarce! (Image)

GJ.921, 1944 World Thrift Day, block of 10 with notable PAPER FOLD, excellent! (Image)

GJ.925CAB, 1945 20c. Mausoleum of Rivadavia WITH WHITE LABEL AT TOP, MNH, excellent and very rare! (Image)