GJ.55, 1877 San Martín 24c., fantastic block of 4, mint with full original gum, 3 examples MNH and 1 with tiny hinge mark, superb, extremely rare in this optimum quality! (Image)

GJ.88, 1888 San Martín 15c., block of 8, mint with original gum, very fresh and attractive, with some fragile perforations, rare! (Image)

GJ227PV, 1899 Seated Liberty, PAIR IMPERFORATE VERTICALLY, mint, very fine quality, rare! (Image)

GJ.304a, 1910 4c. Centenary with variety DOUBLE IMPRESSION OF THE FRAME, used, very fine quality! (Image)

GJ.438, 1917 San Martin 1c. with horizontal honeycomb wmk and perf 13½x12½, MNH (+50%), very fine quality, rare! (Image)

GJ.925SG, 1945 Mausoleum of Rivadavia, PRINTED ON GUM variety, excellent! (Image)

GJ.1000ZA, 1951 Juan Perón 60c., unissued value, block of 4 stamps in different colors (center of the sheet), MNH, excellent quality, very rare! (Image)

GJ.1310CA, San Martín 20P. with white TOP LABEL, MNH, excellent quality, very rare. NOTE: the catalog value is incorrect and will be corrected in the next edition. (Image)

GJ.1358P, 1966 Army day, IMPERFORATE PAIR, with tiny crease of no importance, scarce! (Image)

GJ.1422, 1967 Museum, 4 IMPERFORATE PAIRS in different colors (proofs), excellent quality, rare! (Image)

GJ.1438P, 1968 Map of Argentine Antarctica, 3 IMPERFORATE PAIRS in different colors (proofs), excellent quality, rare! (Image)

GJ.1449, 1968 Battle of Maipú, IMPERFORATE PAIR in violetish chestnut (proof), excellent quality, rare! (Image)

GJ.1456, 1966 Gendarmerie with variety "Green and yellow OMITTED", MNH, very fine quality, very rare, including a block of 4 with normal colors for comparison. (Image)

GJ.1468, 1969 Navy day (frigate Hércules), color progression proof (orange and yellow) in imperforate pair, VF quality! (Image)

GJ.1504, 1969 Aeronautics week, color proof (orange and yellow) in imperforate pair printed on paper for specimens + normal example, very attractive! (Image)

GJ.1755ACD, Brown 70P. printed on fluorescent unsurfaced paper, block of 4 with RIGHT LABELS (the perforation right on the border), very fine quality, extremely rare! (Image)

GJ.1762B, block of 4 with notable variety: BLUE COLOR WITH DOWNWARD SHIFT, along normal block for comparison, fantastic! (Image)

GJ.1782A, pair with VERY SHIFTED PERFORATION, VF! (Image)

GJ.1851, Bariloche with variety RED COLOR OMITTED (without face value), extremely rare and not yet catalogued! (Image)

GJ.1869A, Cockade 600P. printed on CHALKY PAPER, very fine quality, very rare! (Image)

GJ.2387P, 1988/91 Purmamarca (mountains), IMPERFORATE PAIR, very fine quality! (Image)

GJ.2391a, 1988 Ushuaia with variety BLACK COLOR OMITTED (without face value or inscriptions), very fine quality! (Image)

GJ.2400P/2403P, 1988 Engine and carriages, the set of 4 values in IMPERFORATE PAIRS, excellent quality, very rare! (Image)

GJ.2405P, 1988 Korea Olympic Games, IMPERFORATE PAIR, very fine quality! (Image)

GJ.3250P, 2002 Tennis 25c., IMPERFORATE PAIR, very fine quality! (Image)