GJ.2, 1884 Little envelope 1c. perf 14¼, used, VF (Image)

GJ.10a, ½c. dun with INVERTED OVERPRINT, MNH block of 4, 2 with light crease only visible on back, superb front, very nice! (Image)

GJ.26, 25c. Alvear, mint original gum, very fine quality! (Image)

GJ.35, 1901 1c. Liberty Head, franking ALONE a wrapper that contained a military magazine, used in Buenos Aires, with small defects but of fine appearance, scarce! (Image)

GJ.35, 1901 1c. Liberty Head, die proof in greenish gray, printed on card with glazed front, VF quality! (Image)

GJ.36, 1901 2c. Liberty head, franking ALONE a cover sent from Buenos Aires to Bahia Blanca on 29/DE/1902, minor faults, fine appearance, rare! (Image)

GJ.37, 1901 5c. Liberty Head, die proof in black-gray, printed on card with glazed front, VF quality! (Image)

GJ.88a, 1925 1c. San Martín w/o period, with INVERTED overprint, MNH (+50%), excellent! (Image)

GJ.138, 1915 1c. Plowman, without watermark, M.G. ovpt., block of 4 of very fine quality (bottom stamps MNH, +50%), scarce! (Image)

GJ.138, 1915 1c. Plowman, without watermark, M.G. ovpt., mint with tiny hinge mark (it appears MNH), excellent! (Image)

GJ.140, 1915 1c. Plowman, without watermark, M.G. ovpt., block of 4 with interesting VARIETY: The cliche of the top right stamp is OFF KILTER (off center diagonally), very notable and interesting! (Image)

GJ.159, 1918 2c. San Martín with W. Bond wmk, mint, VF quality, rare! (Image)

GJ.175a, 1923 5c. San Martín with period, block of 4 with DOUBLE OVERPRINT, the bottom stamps MNH (+50%) and top stamps with tiny and barely visible hinge mark, excellent quality! (Image)

GJ.213b, 1935/7 5c. Moreno typographed with DOUBLE overprint, one on front inverted and the other one normal on back albino (without ink), MNH, superb and rare! (Image)

GJ.213b, 1935/7 5c. Moreno typographed with DOUBLE overprint, one on front inverted and the other one normal on back albino (without ink), MNH block of 4 with sheet corner, superb and rare! (Image)

GJ.244, 1922 20c. San Martín with large sun wmk, MNH (+50%), very fine quality! (Image)

GJ.318, large block of 90 stamps with DIAGONAL OVERPRINT: lower in the left stamps and several milimiters taller in the right stamps. It also includes varieties "M without period" x2 and also "I without period", excellent! (Image)

GJ.320CJ, 1925 5c. San Martín without period WITH LABEL BELOW, very rare and not yet catalogued, it will be included in the next edition of the GJ catalog with a value of $100. Only 4 examples are known (1 block of 4 + 2 singles), recent find, all with some small perforation fault of little importance! (Image)

GJ.320CJ, 1925 5c. San Martín without period, block of 4 WITH LABEL BELOW, very rare and not yet catalogued, it will be included in the next edition of the GJ catalog with a value of $100. Only 4 examples are known (1 block of 4 + 2 singles), recent find, all with some small perforation fault of little importance! (Image)

GJ.330, block of 14, MNH, all with partial or complete DOUBLE IMPRESSION (not yet catalogued), very notable in some examples, excellent! (Image)

GJ.353a, 1912 12c. Plowman, pair printed on German paper, originally with "M.I." overprint of Ministry of the Interior, and a second "I" was added to be used in the Ministry of Justice and Education, mint without gum, VF quality, rare! (Image)

GJ.398, 1922 20c. San Martín with INVERTED large sun wmk, corner block of 4, MNH (+50%), excellent! (Image)

GJ.419b, 1926 5c. Post Centenary with variety M.J.I. OVERPRINT INVERTED, on cover sent from La Plata to Buenos Aires on 28/DE/1927, VF, extremely rare! (Image)

GJ.450, 1911 2c. Plowman, with sun watermark and PERF 13½, MNH (+50%), superb, very rare! (Image)

GJ.492a, 1925 M.M. overprint on the 2c. San Martín without period, MNH block of 23, some stamps with the period poorly covered forming PAIRS WITH AND WITHOUT PERIOD, VF quality (Image)