GJ.35/44 (including 35A, 36A, 39b), 1867/73 Proceres, cmpl. set including color varieties of 1c and 4c. values, also the 10c. on laid paper, MINT, several with original gum (others without gum), very fine quality, catalog value US$1,377, low start! (Image)

GJ.48/52, 1876/9 Proceres rouletted, cmpl. set of 5 values, mint full original gum, VF quality (very scarce!) (Image)

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

GJ.60, block of 4 with VARIETY: Shifted and a bit diagonal overprint, "(PROVISORIO)" at top in the left stamps, VF quality! (Image)

GJ.61b, 1882 ½c. Little Envelope, block of 4, 2 with variety "8th pearl on the left deformed", very nice! (Image)

GJ.61P, very nice IMPERFORATE PAIR, VF quality! (Image)

GJ.61Aa + 61A, 1882 ½c. Little Envelope, block of 4 in the rare REDISH CHESTNUT, the right stamps with additional "2 WITHOUT SERIF" variety, VF quality, rare, good opportunity at low start! (Image)

GJ.71/76, 1884 provisionals with groundwork of crossed lines, cmpl. set (+72A, vermilion overprint), mint, several examples with original gum. The 1c. with vermilion ovpt has the variety "no line below 1884", very fine quality! Catalog value US$166 (Image)

GJ.72A, VERMILION overprint, along example with overprint in normal color (carmine-rose) for comparison, mint without gum, VF! (Image)

GJ.74b, with DOUBLE OVERPRINT variety, mint without gum, VF quality! (Image)

GJ.75a, with variety "No line below 1884", mint without gum, VF quality! (Image)

GJ.80/93, 1888 Proceres, cmpl. set of 14 mint values of excellent quality. The 40c. with perf 12, all very fresh and sound, very rare in this condition! Catalog value US$853 (Image)

GJ.115, 1889 1P. San Martín, mint very lightly hinged, very fresh and attractive, excellent quality (rare in this condition!) (Image)

GJ.116, 1889 5P. Lamadrid, mint very lightly hinged, very fresh and attractive, excellent quality (rare in this condition!) (Image)

GJ.119A, 1889 50P. Deán Funes, MNH (+50%), absolutely fresh and perfect as the day it was printed, superb! (Image)

GJ.120/30 (without 122, 127), 1889 Proceres, the set of stamps with MIXED PERFORATION (without 1c. groundwork of horiz lines or 5c. with small head and bottom frame interrupted), mint, very fine quality, catalog value US$520, rare, good opportunity! (Image)

GJ.224PV, 1899 10c. Liberty, PAIR IMPERFORATE VERTICALLY, mint without gum, excellent quality! (Image)

GJ.235CI, 1899 1P. Seated Liberty with variety CENTER INVERTED, used, extremely rare (less than 25 known examples!) (Image)

GJ.236CI, 1899 5P. Liberty with CENTER INVERTED variety, VF quality, rare, with Alberto Solari certificate (Image)

GJ.280b, 5c. San Martín in oval, block of 4 consisting of 2 vertical pairs WITH AND WITHOUT WATERMARK (the top stamps without wmk), MNH (+50%), excellent quality, very scarce! (Image)

GJ.288, 1908 1c. San Martín BLUE, one of the best known examples (only 100 in existence), mint with tiny hinge mark (it appears MNH), fresh, excellent quality, fantastic! Signed by Andrés Grozza on back (Image)

GJ.288, 1908 San Martín in oval 1c. blue unissued, MNH (+50%), superb, catalog value US$1,500 + 50% = US$2,250, very rare in this quality! (Image)

GJ.300CI, 1910 ½c. May Pyramid with CENTER INVERTED, MNH (+50%), possibly the best example in existence, signed by Victor Kneitschel on back, catalog value US$2,250 (Image)

GJ.313/5, 1910 Centenary of the May Revolution, the 3 high values of the set, very fine quality! (Image)

GJ.319, 1911 Plowman, DIE PROOF without face value, bluish green chestnut color printed on thin paper, excellent quality! (Image)