GJ.105, 1889 5c. Rivadavia large head with VARIETY: "Bottom perforation with strong upward shift, very small stamp", franking a cover sent from Paraná to Buenos on 17/DE/1890, VF. These varieties on cover are rare! (Image)

GJ.423, 2 used examples, cancelled by typographed impression + postal cancel, the letter impression originated because the stamps were affixed as postage to a newspaper before it was printed, very rare! (Image)

GJ.953, 1947 School crusade for world peace, 5 different COLOR PROOFS, imperforate pairs of very fine quality, rare group! (Image)

GJ.1000, 1951 Quinquennial plan 40c. (telephone and Mercury), 3 COLOR PROOFS in imperforate pairs, very fine quality! (Image)

GJ.1032, 1954 Buenos Aires grain exchange, COLOR PROOFS, 2 imperforate blocks of 4 printed on unsurfaced paper, VF quality, rare! (Image)

GJ.1758B, 110P. San Martín, 90% of the stamp printed on FLUORESCENT UNSURFACED paper and the other 10% on phosphorescent unsurfaced paper, from an end-of-roll double paper, very rare, only 20 examples are known, catalog value US$300 (Image)

Circa 1938, die essay of an unadopted design of 10c. with view of TRONADOR MOUNT, printed on lilac-violet on thin paper, glued to card, VF quality, rare! (Image)

1867 Condor, pair of 5c. printed on thin paper (mint without gum) + single 5c. dark green mint with gum + 50c. orange (without gum), very fine quality! (Image)

Small group of Condor stamps: 5c. green with straightline cancel (it may be cancelled to order) + 4 "dry" impressions: 5c., 10c., and 50c. x2, one with small defect, others of fine quality! (Image)

Sc.2b, 1867/8 Condor 5c. dark green, MNH pair, excellent quality! (Image)

Sc.45, 1894 Coat of arms 50c., MNH block of 4, tiny defect (light crease), excellent appearance! (Image)

Sc.433/50, 1960 Tiahuanacu "Gate of the Sun", cmpl. set WITHOUT OVERPRINT, mounted on a sheet (there is more than one example of several values), VF quality (Image)

Nice cancel of PORTO CALVO (ALAGOAS) on pair of 100Rs., VF! (Image)

RHM.C-133, 1938 Getulio Vargas, very nice maximum card, VF quality! (Image)

RHM.A-51C, 1943 Interamerican Congress of LAWYERS, block of 4 with DOUBLE IMPRESSION of lilac color variety, fantastic and VF, rare, catalog value 960Rs. (Image)

Stamp of 1950 commemorating the NATIONAL CENSUS, block of 12 with postmark of the census + dedicated signature of the President of I.B.S.E., with light staining but interesting! (Image)

Sc.289/91, 1979 International year of the child, the set of 3 values in IMPERFORATE GUTTER BLOCKS OF 4, excellent! (Image)

Columbus: Group of fiscally used stamps, including 2 nice blocks of 6 and of forgery stamps, very fine quality, interesting! (Image)

Columbus: Hahn reprints, nice group of VF quality! (Image)

Sc.105a, 1911 20c. Manuel Bulnes with CENTER INVERTED variety, mint lightly hinged, VF quality! (Image)

Sc.780 + other values, 1988 Easter Island, stamps issued in 1988 and later stamps with overprint, group of sets, fragments and 2 booklets. The lot includes color and paper varieties, very interesting! (Image)

Sc.20/24, 1926 Saint Francis, cmpl. set of 5 MNH values, perfect, superb quality! (Image)

Very attractive envelope bearing aviation set of the year 1942, minor defects, very nice! (Image)

Yvert 37 in block of 9 + Yvert 92 in strip with gutter, MNH, VF! (Image)

Sc.5, 1865 1R. green, mint vertical pair, both with defects (top stamp thinned, bottom stamp with tear), fine appearance! (Image)