GJ.661a, 1930 50c. Zeppelin with INVERTED OVERPRINT, excellent quality, signed by Victor Kneitschel on back! (Image)

GJ.848Ab, block of 4, one with variety "Spot above the cockpit and accent over the first R of CORREOS", VF quality! (Image)

GJ.861P, 1942 1P. with sun wmk, IMPERFORATE BLOCK OF 4, also with notable unprinted areas, excellent quality! (Image)

GJ.1083, 1957 Economic Conference, PROOF in light lilac printed on normal paper (with watermark and gum), imperforate pair, very nice! (Image)

GJ.1170a, block of 4, one with VARIETY: "Thick bracket below the balcony, above the 0" (pos.83), VF! (Image)

GJ.1183P + 1185P + 1186P, 1960 EFIMAYO Exhibition, cmpl. set of 3 IMPERFORATE PAIRS on FDC covers. Of the 6+3P. value (which is not known imperf), a FDC was made with a proof in dark lilac, excellent quality, very rare! (Image)

GJ.1258a, 1963 Cycling, block of 4 with variety "fallen jersey" (red color very shifted!), excellent quality! (Image)

GJ.1278SG, 1964 UPU Congress, PRINTED ON GUM variety, excellent quality and very rare! (Image)

GJ.1337A, 1965 12P. Airplane, printed on chalky paper, block of 4 with VARIETY: "Face value shifted" (partially on the wing), very fine quality! (Image)

GJ.1349SG, 1966 Rocket launching in Antarctica, PRINTED ON GUM variety, excellent quality and very rare! (Image)

GJ.5, 2P. blue, type 38 on the sheet, example with huge margins, franking a folded cover sent to Tucumán on 27/JUL/1858, with mute ponchito cancel perfectly applied along a rimless datesatmp of Buenos Aires, very fine quality, very rare. With certificates of Alberto Solari and A.P.S. (Image)

Cover sent from Comodoro Rivadavia to Buenos Aires on 18/O/1984 franked with $a47.50 (some stamps on back, killed with pen), and it bears 2 interesting cinderellas also cancelled: "Association for help of blind persons" with value of $10,000 and "Chubut - visit our city - Lions Club - Comodoro Rivadavia" (view of an oil drilling tower), arrival backstamp, VF quality! (Image)

GJ.1, 5c. blue, MNH (+200%), very fresh, excellent quality, rare! (Image)

GJ.1a + 1, 5c. light blue, horizontal pair (positions 17 and 18), the left stamp with variety "period after CEN", mint without gum, very nice, signed by Victor Kneitschel on back. (Image)

REPRINTS: 7 blocks of 4 printed (with the original plates) on papers of different colors, all different, excellent quality! (Image)

GJ.58, 1882 ½c. on 5c. perforated across the middle, large P, MNH pair (+50%), the left stamp with sheet margin and perforation variety (salto de peine, it is much wider!!), excellent! (Image)

GJ.63, 1882 Little Envelope 12c., 3 ESSAYS of unadopted designs, very fine quality, rare lot! (Image)

GJ.71, 1884 provisional of ½c., with the overprint completely shifted and divided among the 4 corners of the stamp, splendid! (Image)

GJ.149 + 150, 1892 multiple die proof of 2P. + 1P. San Martín, printed in blue on thin paper, very fine quality, rare lot! (Image)

GREAT RARITY: GJ.220a, 1899 3c. Seated Liberty, pair WITH AND WITHOUT WATERMARK, excellent quality, outstanding rarity! (Image)

EXTREMELY RARITY: GJ.221PH, 1899 4c. Seated Liberty, pair IMPERFORATE HORIZONTALLY, very fine quality, very few known examples, great rarity! (Image)

GJ.223, 1899 6c. Seated Liberty, uprating a wrapper of 2c. San Martín in medalion, sent to Uruguay with insufficient postage and it received a 1c. Uruguay postage due stamp, spectacular combination! (Image)

GJ.273, 1902 Port of Rosario (ships, boats, dock), 6 different color proofs, block of 4 printed on thick paper with glazed front, excellent quality, rare lot! (Image)

GJ.300, ½c. May pyramid, with VARIETY: "top part of the pyramid double" (reentry), rare, VF quality! (Image)

GJ.315a, 1910 20P. San Martín WITHOUT WATERMARK variety, MNH (+50%), sheet corner, superb, the best one of the 20 known examples!! (Image)