GJ.17, 1P. blue, very nice copy franking a folded cover sent from Buenos Aires to Montevideo on 14/JUN/1862 by ship "Libertad", VF quality! (Image)

GJ.1, used in Salta, signed on back by Alberto Solari, very fine quality! (Image)

GJ.36, 1867 4c. Moreno, large block of 12 postally used, with double circle datestamp of CONCORDIA, excellent and rare! (Image)

GJ.36, 4c. Moreno, block of 12 with oval cancels "CORREOS Y TELÉGRAFOS - MERCEDES (CORRIENTES)" 13/DE/1890, very fine quality, rare! (Image)

GJ.38, pair + 9 singles, all on fragments, almost all with complete cancels and all perfectly applied and legible, excellent quality, very nice group! (Image)

GJ.125a, 1889 5c. Rivadavia type I (large head) COMPOUND perf 11½x12, with COMPLETE DOUBLE PERFORATION var., very rare, under valued in the GJ catalog (it will be corrected in the next edition), very few known! (Image)

GJ.217P, 1899 ½c. Liberty, IMPERFORATE PAIR, VF quality! (Image)

GJ.527, 1921 5c. Mitre, block of 4, the left stamps IMPERFORATE VERTICALLY at left, very rare variety, VF quality! (Image)

GJ.694CJ, 1930 50P. Revolution with label below, and MUESTRA ovpt., VF quality, rare! (Image)

Gift book prepared by the Post for members of the XI UPU CONGRESS held in 1939 in Buenos Aires, it includes the definitive and commemorative issues of the period, with their high values, all of excellent quality. This is the rarest gift book of Argentina, and it is difficult to find it in such superb quality. The previous owner paid US$450 in the mid 1990s, very fine opportunity! ATTENTION: please view all the photos of the lot, because all its content has been scanned. (Image)

PROOF OF BOOKLET PANE: GJ.744, 5c. Moreno offset impression, block of 10 examples (proofs) cut out from a larger sheet of proofs, with pen marks over the fragment stamps surrounding the block, printed on special paper for specimens, excellent and rare! (Image)

GJ.867, 1942 Columbus Lighthouse, PROOF, imperf block of 4 printed in the issued color on unsurfaced paper for specimens, VF quality! (Image)

GJ.880P, 1P. Map with Antarctica printed on national unsurfaced paper, spectacular IMPERFORATE PAIR, excellent quality, rare! (Image)

GJ.891, 5c. San Martín typographed, PROOFS, 2 perforated blocks of 4 printed on very thin paper, without watermark and gum, different shades, VF quality, very rare! (Image)

GJ.1051, 4.40P. Sáenz Peña, PROOF in the issued color, block of 4 printed on very thick paper, excellent! (Image)

GJ.1275P, 1964 Aviator Jorge Newbery, IMPERFORATE PAIR, rare, VF quality! (Image)

GJ.1288, 1964 Joaquín V. González, corner block of 6, one stamp COMPLETELY UNPRINTED (producing a white label), other 2 partially unprinted, and in part, printed on back, the missing stamp is PRINTED ON GUM, MNH, exceptional variety, unique! (Image)

GJ.1766, 1977 500P. Argentine Antarctica, block of 4 with Casa de Moneda watermark, MNH, very fine quality! (Image)

GJ.1877a, 1979 Subteniente Berdina with variety DOUBLE IMPRESSION OF GOLD COLOR, very rare variety that will be included in the next edition of the GJ catalog, few known examples! (Image)

GJ.3794a, 2010 Regatta, WITHOUT COATING variety, corner block of 4, excellent quality, rare. Along normal block for comparison! (Image)

GJ.4156P, 2016 Lemon 5$ IMPERFORATE PAIR, very rare, only 20 known (one sheet) (Image)

GJ.4251a, 2018 provisional of $1 on 75c., BLOCK OF 4 with SILVER COLOR OMITTED variety, excellent and very rare (a few examples are known, almost all with defects and only 10 of superb quality!) (Image)

GJ.11a, 1884 1c. Little Envelope perf 12¼ with diagonal and INVERTED overprint, mint with full original gum, superb and very rare. Signed by Kneitschel on back. (Image)

GJ.20, 1884 12c. Little Envelope perforation 14¼, used, superb, extremely rare (very few known genuine examples, the catalog value is incidental). With several guarantee signatures on back, including Victor Kneitschel (Image)

GJ.558, 1931 20c. San Martín typographed with "M.O.P." ovpt., MNH block of 4 (+50%), superb! (Image)