GJ.35, pair with rectangular datestamp of "TALA - ENTRE RIOS", very rare! (Image)

GJ.35A + 36, both with reconstructed mute cancel of YOKOHAMA (Japan), great rarity! (Image)

GJ.35A, with the rare mute rectangular Jorge Vallée stagecoach mail cancel in negative, very fine quality! (Image)

GJ.35A, franking a fragment of newspaper sent from Buenos Aires to Dolores, excellent quality! (Image)

GJ.35A, with rare diamond "E" cartería cancel, excellent quality! (Image)

GJ.38, 2 examples on fragment with framed "CERTIFICADO" in double rectangle of San Luis, VF quality (Image)

GJ.60e, with variety INVERTED OVERPRINT, VF quality! (Image)

GJ.76n, with variety INVERTED OVERPRINT, mint without gum, excellent! (Image)

GJ.90, 25c. Belgrano, 3 used examples, VERY DIFFERENT SHADES, VF quality! (Image)

GJ.92, 1888 40c. Mariano Moreno perf 11½ with MUESTRA overprint, MNH, excellent! (Image)

GJ.95, 40c. Moreno perforation 12, beautiful used block of 8, excellent! (Image)

GJ.98, 1889 1c. Vélez Sársfield, die essays of an UNADOPTED DESIGN with the face looking to the left (type III on the 1958 Kneitschel catalog) printed on thin paper in different colors, excellent quality, very rare! (Image)

GJ.103, 1889 3c. Juárez Celman, large block of 40 stamps, MNH (+50%), top part of the sheet with printer imprint, excellent quality, as fresh and perfect as the day it was printed! (Image)

GJ.105, 1889 5c. Rivadavia type I (large head), 5 blocks of 4 in very different colors, MNH (+50%), superb. Some also show some differences between them in the paper, very unusual group of great quality! (Image)

GJ.105, 1889 5c. Rivadavia type I (large head), complete sheet of 100 examples, MNH (+50%, only 4 stamps have light hinge marks), superb, perfect and fresh as the day it was printed, very rare, possibly the only one known! (Image)

GJ.105P, 1889 5c. Rivadavia (type I, large head) in IMPERFORATE PAIR, MNH (+50%), superb! (Image)

GJ.109, 1889 8c. Rivadavia, complete sheet of 100 stamps, MNH (+50%, only a few with tiny hinge marks), excellent quality, rare! (Image)

GJ.109P, 1889 8c. Rivadavia, IMPERFORATE PAIR, MNH (+50%), superb! (Image)

GJ.109B, 1889 8c. Rivadavia, block of 4 in the very rare LILAC-ROSE color, MNH (+50%), superb, only few known! (Image)

GJ.109B, 1889 8c. Rivadavia in the very rare LILAC-ROSE color, MNH (+50%), superb, very scarce! (Image)

GJ.110, 1889 10c. Avellaneda, 2 complete sheets of 100 examples in dun and chestnut. The lighter one is type II (softer pearls in the white strips around the lined area, but no line on the forehead), and the darker one is type III (without pearls), MNH (only a few examples with light hinge marks), excellent quality, rare! (Image)

GJ.110, 1889 10c. Avellaneda, blocks of 4 of types I, II and III (with soft pearls in the white strips and light line on the forehead, with the pearls but no line, and without pearls). These 3 types are produced by the wear of the printing plate, MNH blocks of excellent quality, rare group! (Image)

GJ.110P + 110AP, 1889 10c. Avellaneda, IMPERFORATE PAIRS in yellowish dun and dark dun, MNH (+50%), superb! (Image)

GJ.110P + 110AP, 1889 10c. Avellaneda, IMPERFORATE BLOCKS OF 4 in yellowish dun and dark dun, MNH (+50%), superb! (Image)

GJ.114, 1889 Posadas 60c. black-blue, fantastic MNH block of 4 (+50%) with sheet margin with complete printer imprint, very fresh, perfect, very rare in this quality! (Image)