Cover franked with 4x 1c. Balcarce gray-violet (GJ.35A) + 2x 2c. Vicente Lopez green (GJ.53), total 8c., sent from JUJUY to Buenos Aires on 10/JUN/1879, very rare combination! (Image)

VERY RARE COMBINATION: Folded cover dated 6/OC/1868 and sent to Rosario, franked with 10c. consisting of a unique combination of GJ.37 + 38 (5c. Rivadavia with groundwork of HORIZONTAL lines + groundwork of CROSSED lines), perfectly cancelled with "ADMON DE CORREOS - CORDOBA" double circle, excellent quality, great rarity! With Alberto Solari certificate. (Image)

Registered cover sent to Valparaiso, franked with pair GJ.41 (15c. San Martín with groundwork of horiz lines), with several CERTIFICADO marks (even one on back) and SAN JUAN datestamp, very rare, excellent quality! (Image)

Cover sent by French paquebot from Buenos Aires to Paris on 8/SE/1883 with large postage of 84c. consisting of GJ.43 (60c. Posadas) + 52 (San Martín 24c. rouletted), with datestamps of Buenos Aires and straightline sea mail mark, arrival backstamp for 5/OC, VF quality, very rare! (Image)

GJ.45/47, 1877 provisional, cmpl. set of 3 mint values, the low value without gum, the rest with original gum (+100%), VF quality, catalog value US$400, good opportunity! (Image)

Entire letter sent to Lobos on 20/MAR/1877, franked with GJ.47 and cancel of "OFICINA 11 DE SETIEMBRE", excellent quality, signed Victor Kneitschel (Image)

GJ.54PH, vertical pair IMPERFORATE HORIZONTALLY, mint without gum, VF! (Image)

GJ.54A, 1877/87 Rivadavia 8c. type II, in the rare claret color, mint with gum but with some stain spots, good front, very rare unused! (Image)

GJ.56, 1877 25c. Alvear, mint, sheet margin with printer imprint, superb, rare! (Image)

GJ.57e, small P, pair with variety DOUBLE PERFORATION across the middle, superb, rare! (Image)

GJ.59g, small P, with DOUBLE overprint variety and also offset impression on back, VF and rare! (Image)

GJ.59H, small P, DOUBLE overprint variety, ONE DIAGONAL and also offset impression on back, VF and rare! (Image)

GJ.60e, large P, with INVERTED OVERPRINT variety, mint without gum, excellent quality! (Image)

GJ.60e, large P, block of 4 with INVERTED overprint, mint original gum, VF quality! (Image)

GJ.60o, large P, pair, the right stamp with PROVISOBIO variety, excellent quality, rare! (Image)

GJ.71a, with variety "½ at top", striking quality (rare!) (Image)

GJ.73b, with INVERTED OVERPRINT variety, mint without gum, VF quality! (Image)

GJ.75b, INVERTED vermilion overprint, mint, VF quality, rare, signed by Victor Kneitschel on back. (Image)

GJ.76n, with INVERTED OVERPRINT variety and sheet margin with printer imprint, mint with full original gum and tiny hinge mark, superb, rare in this fantastic quality! (Image)

GJ.77, pair franking a cover that contained printed matter (1c. domestic rate), sent from Buenos to Tucumán by EXPRESO VILLALONGA, it received a violet circular mark of that service and then it was forwarded by the Mail to its final destination Salta, where the postage was cancelled, on 16/MAR/1887, excellent and very rare! (Image)

GJ.78BI, 1c. example + diagonal BISECT (total 1½c.) franking a fragment with rectangular datestamp of "Estafeta Ambulante Nº17 - F.C. Sur", VF quality, very rare! (Image)

GJ.91A, 1888 30c. Dorrego, in the rare CHOCOLATE color, used in Mendoza, superb! (Image)

GJ.112P, 1889 40c. Moreno, IMPERFORATE PAIR, VF quality! (Image)

GJ.113P, 1889 50c. Mitre, IMPERFORATE PAIR, very fine quality! (Image)

GJ.118, 20P. Guillermo Brown, die proof in dark dun, printed directly on card, excellent quality, rare! (Image)