GJ.35A, block of 4 with cancels: circular datestamp of Buenos Aires and rectangular of MAGDALENA well applied in the center (complete), one stamp with minor defect, else superb, very rare! (Image)

GJ.37, 1867/73 5c. Rivadavia, extremely rare postally used block of 4 (one of the 2 known examples!!), cancelled in the center "ESTAFETA DE MERCEDES - S.L.", excellent quality, a great post-classic rarity. With Alberto Solari certificate (Image)

GJ.41, 15c. San Martín, groundwork of horizontal lines, mint no gum, well centered, very fine piece, very rare! (Image)

GJ.41, 1867 15c. Brown with groundwork of horizontal lines, beautiful postally used block of 4 (very few known), cancelled in the center "CORREO NACIONAL - FRANCA - DEL MORRO", excellent and very rare. With Alberto Solari certificate (Image)

GJ.44, 1867 90c. Saavedra, rare MINT BLOCK OF 4 with full original gum, excellent quality (top stamps lightly hinged, bottom stamps MNH), very rare! (Image)

GJ.44, 1867 90c. Saavedra, block of 4 (2 stamps MNH!) with MUESTRA overprint, excellent quality, rare! (Image)

GJ.49, 1876 Rivadavia 8c. rouletted, BLOCK OF 4 mint without gum, excellent quality, rare! (Image)

GJ.53, 1877 2c. Vicente López, large block of 15 stamps, mint without gum, very fine quality, one of the largest known multiples! (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.55, 1877 24c. San Martín, pair with carmine "SPECIMEN" overprint and both stamps with punch cancel, VF quality! (Image)

GJ.71f, 1884 ½c. on 5c. with INVERTED overprint, used, excellent quality, rare! (Image)

GJ.75b, 1884 1c. on 15c. INVERTED vermilion overprint, very fine quality, rare, signed by V.Kneitschel on back! (Image)

GJ.76f + 76n, 2 examples with diagonal and inverted overprint, VF! (Image)

GJ.91, 1888 Dorrego 30c., handsome mint block of 4 (top stamps are lightly hinged, the bottom stamps MNH), light crease in one corner else superb! (Image)

GJ.99, 1c. Velez Sársfield with Globes watermark on 100% of the stamp, mint without gum, excellent quality, rare! (Image)

GJ.99, 1c. Velez Sársfield with Globes watermark, used, excellent quality, rare! (Image)

GJ.116, 1889 5P. Lamadrid, used, very good example! (Image)

GJ.117, 1889 10P. Vicente López, mint lightly hinged, excellent quality, rare! (Image)

GJ.118, 1889 20P. Brown, mint lightly hinged, excellent quality, rare! (Image)

Printed matter franked by GJ.133 ALONE (¼c.) posted in Buenos Aires on 10/JUN/1890, with some minor defects but extremely rare (this stamp is very scarce used alone, paying the basic rate for local printed matter that was valid for a very short time!) (Image)

GJ.142A, 5c. light green (color error), VF quality, rare! (Image)

GJ.148P, 1892 1P. San Martín IMPERFORATE PAIR, issued without gum, excellent quality, very rare! (Image)

GJ.151P, 1892 5P. San Martín in IMPERFORATE BLOCK OF 4, issued without gum, excellent quality, very rare! (Image)

GJ.168PH, pair IMPERFORATE between, USED, with a pulled perforation else excellent, very rare (only 2 or 3 known in used!) (Image)

GJ.223PH, 1899 6c. Liberty, pair IMPERFORATE HORIZONTALLY, MNH (+50%), superb and rare! (Image)