GJ.36, 1867 4c. Moreno, lot of over 70 stamps, VARIED CANCELS, almost all different including several very interesting examples, good opportunity for the specialist! (Image)

GJ.61a, 1882 171c. Little envelope, block of 15, the 3 on the left with VARIETY "2 without serif", MNH (3 normal stamps with hinge mark), excellent quality! (Image)

GJ.72Ah, ½c. on 15c., inverted VERMILION overprint (variety not yet catalogued in this color), rare! (Image)

GJ.100, 1889 1c. Velez Sársfield WITH very notable Stiller & Laas watermark (on about 80% of the stamp), excellent and rare! (Image)

GJ.141, 1892 Rivadavia 5c. red, proof in the issued color, corner block of 8 printed on thin yellowish paper, VF quality! (Image)

GJ.142A, 1892 Rivadavia 5c. GREEN, color error, MNH (+50%), superb, rare in this exceptional quality! (Image)

GJ.151, 1892 5P. Old San Martín, unadopted design, die essay on thick paper with printing number "R-A-8", VF quality! (Image)

GJ.203, 1896 1.20P. San Martín PERFORATION 12, excellent quality, rare! (Image)

GJ.218P, 1c. Seated Liberty, IMPERFORATE PAIR, excellent quality, rare (few known!) (Image)

GJ.219, 2c. Seated Liberty, vertical strip of 3 WITH AND WITHOUT HORIZ PERFORATION, rare, very fine quality! (Image)

Large fragment with GJ.220 (strip of 3) + 221 (pair), used in CACHARI (Buenos Aires), excellent quality, rare cancel! (Image)

VERY RARE IMPERFORATE PAIR: GJ.220P, 3c. Seated Liberty, IMPERFORATE PAIR, MNH (+50%), great rariety of this issue, missing in most collections! (Image)

RARITY: GJ.220PV, 3c. Seated Liberty, horiz pair IMPERFORATE BETWEEN, mint with tiny and barely visible hinge mark (it appears MNH!), extremely rare! (Image)

GJ.221, 4c. Seated Liberty + ½c. x2 + 1c. (GJ.217/8, total 6c.), franking a postcard sent to Germany on 5/AP/1908, VF quality! (Image)

UNIQUE BLOCK OF 4: GJ.221PH, 4c. Seated Liberty, block of 4 IMPERFORATE HORIZONTALLY, used in Rosario on 7/AP/1904, with a couple of light creases visible on back, superb front, only known used example! (Image)

GREAT RARITY AND LARGEST MULTIPLE: GJ.221PV, 4c. Seated Liberty, block of 6 IMPERFORATE VERTICALLY, the bottom stamps are MNH (+50%), excellent quality, exceptional rarity! (Image)

GJ.222, 5c. Seated Liberty, corner block of 4 IMPERFORATE below, on a cover used in Buenos Aires on 18/JUL/1906, VF and rare (very rare variety on cover!) (Image)

GJ.223P, 6c. Liberty, IMPERFORATE PAIR, excellent quality! (Image)

GJ.224PH, 10c. Liberty, vertical pair IMPERFORATE BETWEEN, excellent quality, rare! (Image)

GJ.229, 1899 20c. Seated Liberty, fragment bearing one stamp and diagonal half of another one used as 10c. (total 30c.), with cancel of 6/JA/1904 of some town in the province of Tucumán, excellent quality, very rare! (Image)

GJ.232, 1899 Seated Liberty 30c. vermilion, used example IMPERFORATE VERTICALLy, uncatalogued variety, wide vertical margins, very rare! (Image)

GJ.238, 1899 20P. Seated Liberty, splendid corner single used in Mendoza, superb! (Image)

GJ.275, 1908 ½c. San Martín in oval, block of 8 with double cancel "AGENTE POSTAL EMBARCADO Nº13", excellent and rare! (Image)

GJ.287b, 1908 50c. San Martín in oval, block of 4 formed by 2 pairs WITH AND WITHOUT WATERMARK, the bottom pair is MNH (+50%), excellent! (Image)

GJ.383, ½c. Plowman, on Italian paper, corner block of 4 with notable PERFORATION VARIETY, excellent! (Image)