Sc.171/177, 1925 Proclamation of the Republic, compl. set of 7 overprinted values, very fine quality! (Image)

GJ.38, on folded cover dated 7/JUL/1869, with double circle GUALEGUAYCHÚ cancel, VF quality, rare! (Image)

GJ.50, 1876 Belgrano 16c. rouletted franking a cover sent from Buenos Aires to Paris on 8/JA/1881, very nice! (Image)

GJ.63, 1882 12c. ultramarine, perf 12½, franking a cover sent from Buenos Aires to Paris on 25/DE/1885, VF quality! (Image)

GJ.98, 1c. Dalmacio Velez Sársfield, die proof in dark lilac, printed on thin paper and mounted on card, excellent quality! (Image)

GJ.106, 1889 5c. Rivadavia, die proof of the SECOND STAGE in the evolution of the design (adopted), chestnut-black color, on card, excellent quality! (Image)

GJ.135/6, 1892 Discovery of America 400 years, ships, set of 2 values in COMPLETE SHEETS of 50, mint never hinged, superb, one of only 3 or 4 known sets! (Image)

GJ.151, 5P. San Martín, reprints (2 different sheets) manufactured by the Sociedad Filatélica Argentina with the original die before and after being defaced, signed by Eliçabe and other renowned philatelits of the period, VF quality (Image)

GJ.403, 1915 5c. Declaration of Independence, ESSAY of an unadopted design, large size (36.5 x 25 mm), red, excellent quality, extremely rare! (Image)

GJ.600EHA, pair with horizontal fancy GUTTER, VF, good opportunity! (Image)

GJ.758, 1935/52 40c. Sugar cane, PROOF in the adopted color, printed on special paper for specimens, excellent quality! (Image)

GJ.839, 1940 Panamerican Union 50 years, PROOF in steel blue, PERFORATION 13 x 13½, printed on opaque white paper, VF quality, rare! (Image)

GJ.853, 1941 Banco de la Nación Argentina, PROOF in slate gray, imperforate block of 4 printed on paper of glazed front, VF quality (one stamp with minor thin on reverse, almost insignificant), rare! (Image)

GJ.869, 1942 José C. Paz, PROOF printed on special paper for specimens (type II), with a second impression on reverse, VF quality! (Image)

GJ.926, 1946 Unknown Soldier, 4 TRIAL COLOR PROOFS in blocks of 4 printed on paper glazed on both sides (3) or glazed on front (bluish gray), VF quality! (Image)

GJ.933/4, 1946 Aeronautics week, PROOFS in the adopted colors, imperforate pairs on ordinary paper, VF quality! (Image)

GJ.940, 1946 World Thrift Day, PROOF in the adopted color, imperforate block of 4 printed on unsurfaced paper, VF quality! (Image)

GJ.956, 1948 Indian day, COLOR PROOF printed on paper of glazed front, imperforate block of 4 + perforated pair, rare group! (Image)

GJ.959, 1948 Bicentennial of the Post, PROOF in olive green on thick regular paper, perforated block of 4, VF and rare! (Image)

GJ.960, 1948 Farmers day, PROOFS printed on opaque paper, pairs in the 4 known colors, VF quality, rare group! (Image)

25 February 1951, First Panamerican Games, UNADOPTED ESSAYS printed by Casa de Moneda on white or opaque paper, 20c. Athletics/Track & field, 2 different colors, excellent quality, extremely rare! (Image)

25 February 1951, First Panamerican Games, UNADOPTED ESSAY printed by Casa de Moneda on white or opaque paper, 40c. Combat, excellent quality, extremely rare! (Image)

25 February 1951, First Panamerican Games, UNADOPTED ESSAY printed by Casa de Moneda on white or opaque paper, 70c. Baseball, excellent quality, extremely rare! (Image)

25 February 1951, First Panamerican Games, UNADOPTED ESSAY printed by Casa de Moneda on white or opaque paper, 80c. Boxing, excellent quality, extremely rare! (Image)

25 February 1951, First Panamerican Games, UNADOPTED ESSAY printed by Casa de Moneda on white or opaque paper, 6P. Shooting, excellent quality, extremely rare! (Image)