GJ.96, ¼c. José M. Paz, PROOF in greenish blue, block of 4 PERFORATION 11½, printed on paper without gum, very rare! (Image)

GJ.55, 1877 24c. San Martín, pen cancelled block of 9, VF quality! (Image)

GJ.55, 1877 24c. San Martín franking ALONE a registered cover sent from SAN LUIS to Buenos Aires on 29/OC/1887, VF and very rare! (Image)

GJ.59d, 1882 ½c on 5c., small P ovpt., fantastic block of 20 (top part of the sheet) with DIAGONAL overprint, mint with full original gum, excellent! (Image)

GJ.142, 1892 Rivadavia 5c. GREEN, color error, splendid MNH example (+50%), possibly the ONLY ONE IN EXISTENCE in such exceptional quality. With perfect gum, beautiful color, fresh and impeccable as the day it was printed, on back it has a manuscript inscription by Victor Kneitschel: "original" and his signature, great rarity! (Image)

GJ.145P, 1892 16c. Belgrano with small sun watermark, IMPERFORATE PAIR of very fine quality! (Image)

GJ.148P, 1892 1P. San Martín with small sun watermark, IMPERFORATE PAIR of very fine quality. One of the few known pairs with original gum (in the catalog generally valued without gum) (Image)

GJ.162, 1892 2P. San Martín with small sun watermark, PERFORATION 12, used, very rare, VF quality! (Image)

GJ.216, 1896 1.20P. San Martín with COMPOUND PERFORATION, 12 below and 11½ on the other sides, excellent quality, very rare! (Image)

GJ.217, etc, lot of COLOR PROOFS: 13 singles + 15 pairs of values from ½c. a 50c., varied colors, very fine quality, very attractive group! (Image)

GJ.230, 24c. Seated Liberty, fantastic corner block of 4, inverted watermark variety, 3 stamps MNH (+50%), excellent! (Image)

GJ.232, Seated Liberty 30c. dull vermilion, 3 blocks of 4 in very different shades, one with inverted watermark, excellent quality, very nice group! (Image)

GJ.234, 50c. Liberty, 2 blocks of 4 in different shades: dark blue and a rare GREENISH blue also with inverted watermark, the latter is MNH (+50%), very fine quality! (Image)

PHILATELIC BEAUTY: GJ.238, 20P. Liberty with sheet corner, used in Rosario on 27/JA/1908, excellent, possibly the most handsome used example in existence! (Image)

GJ.257, 1P. Liberty PERFORATION 12 with bulk mail cancellation (punch hole), very fine quality, rare! (Image)

Registered cover used in Buenos Aires on 3/AU/1912, franked with all the values of the San Martin in oval set, excellent quality, handsome! (Image)

GJ.279c, 1908 4c. San Martín in oval with variety inverted "A" replacing the "V" of CENTAVOS, very scarce! (Image)

GJ.283a, 1908 San Martín in oval 12c. blue WITHOUT WATERMARK variety, not catalogued as used, value of mint example US$250, very fine quality, extremely rare! (Image)

SPERATI FORGERY: GJ.315, 1910 20P. Centenary of May Revolution, extremely rare die proof forged by Jean de Sperati, with his signature below. It is the only stamp of the XX century forged by this great forger, extremely rare, excellent quality! (Image)

GJ.333b, pair WITH AND WITHOUT WATERMARK, MNH (+50%), excellent! (Image)

GJ.342, 1912 5c. Plowman on German paper, block of with bulk mail perforated cancel, excellent qulaity, low values with these cancellations are rare! (Image)

GJ.344, 12c. Plowman, large block of 40 stamps, top part of the sheet, 37 are MNH (+50%), excellent quality. It includes varieties such as "flaw in the top border and accent over the R of REPUBLICA" (position 2), "retouch on the lined background, at top right" (pos.3), "REPUBLICA with short L" (pos.12), "spot below RE of REPUBLICA" (pos.24), "AR6ENTINA" (pos.31), "white dote on IC of REPUBLICA" (pos.36), etc.,very nice! (Image)

GJ.359, 1912 1P. Plowman, PROOF in the issued color, imperforate pair printed on thick paper, excellent quality! (Image)

GJ.381, 1915 20c. Plowman, Italian paper with vertical honeycomb wmk, perf 13½, very fine quality, very scarce! (Image)

EXTREMELY RARE DIE PROOF: GJ.396, etc., multiple die proof of values of Centenary of Independence issue (½c, 3c and 12c. with groundwork of crossed lines, partially not adopted) printed in black on paper with glazed front, with another paper overlapping with 3 windows that allow to view the stamps and inscription "Ensayo Preliminar obtenido con piedra y por reproducción fotográfica (procedimiento fotolitográfico)", excellent quality, fantastic! (Image)