GJ.1429a, Stylized airplane 40P. with very notable COMPLETE DOUBLE IMPRESSION variety, excellent quality! (Image)

GJ.10, IN Ps. yellowish dun, mint without gum, fantastic example of wide margins, excellent quality, with Alberto Solari certificate (Image)

GJ.17, 1P. light blue, very nice example of wide margins, franking a folded cover to Goya, lightly canceled by ponchito of Buenos Aires, superb! (Image)

Very handsome cinderella of the National Commission for the Monument to Leandro N. Alem, applied along the postage of 5c. on a cover used in Buenos Aires on 7/MAY/1919, VF quality! (Image)

World Championship in Athletics, year 1927, used, VF and rare! (Image)

GJ.1, used with ROSARIO cancel, superb, signed on back by Alberto Solari. (Image)

GJ.1, used with FRANCA cancel of Concordia, VF quality, signed on back by Alberto Solari (Image)

GJ.2, with DOUBLE cancellation: FRANCA of Paraná in double ogive + ROSARIO - FRANCA in double ellipse, very rare, fine quality, signed by Alberto Solari on back (Image)

GJ.6, yellow, with spectacular mute "dotted" cancel of Corrientes, VF! (Image)

GJ.9, purple, type 8, example of immense margins franking a cover with double circle cancel of MERCEDES in greenish black, very rare, with Alberto Solari certificate. (Image)

GJ.38, 5c. Rivadavia franking a folded cover cancelled in ATAMISQUE (Santiago del Estero), sent to Ojo de Agua on 24/JUN/1875, VF quality, rare! (Image)

GJ.41, on folded cover sent from GUALEGUAYCHU to Buenos Aires on 8/AU/1875, VF quality! With Alberto Solari certificate (Image)

GJ.42, 1867 30c. Alvear, DIE PROOF printed in black on thin paper glued to card, with HORIZONTAL FORMAT, and printing numbers "3380" and "V36968", excellent quality, extremely rare and possibly unique! (Image)

GJ.44, 1867 90c. Saavedra with VARIETY: very shifted perforation, used, excellent quality, rare! NOTE: the varieties of this issue are very scarce and hard to find! (Image)

GJ.52, 1876 24c. San Martín rouletted, block of 4 with double rectangular datestamp of CORRIENTES, rare, excellent quality! (Image)

GJ.54, 54A or 54B, lot of more than 440 used stamps, general quality is fine to VF, with a wide rage of cancels, many are very legible and interesting (market value of each copy is US$1 to 10!), good opportunity! (Image)

GJ.59h, 1882 provisional of ½c. on 5c., with variety: DOUBLE overprint, ONE DIAGONAL and with offset impression on back, VF and rare! (Image)

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

GJ.518, 1920 12c. San Martín, FISCAL SUN watermark, used, VF quality, rare, catalog value US$200. (Image)

GJ.599EV, 1924 5c. San Martín, block of 4 with VERTICAL GUTTER, used, excellent quality, rare! (Image)

GJ.600EHA, 1924 10c. San Martín, vertical pair with DECORATED GUTTER, used on small fragment, excellent quality, rare! (Image)

GJ.619, San Martín 30c. printed on RIBBED PAPER + 5c., franking a mourning cover sent by airmail from Buenos Aires to SAPUCAY (PARAGUAY) on 18/MAY/1929. With arrival marks on front and back, very fine quality, rare postage and rare destination! (Image)

GJ.622/625, 1926 Post Centenary, UNADOPTED ESSAYS, 7 different blocks of 4, MNH, excellent quality, rare! (Image)

GJ.629d, 1927 5c. San Martín with AP watermark, block of 6, ONE WITH PERIOD (top left stamp), superb! (Image)

GJ.854, 1941 General Lavalle, trial color PROOF on paper of glazed front, imperforate block of 4, excellent quality! (Image)