GJ.38, with rare cancel, possibly of STEAMER APOLO, very fine quality! (Image)

GJ.38, franking a folded cover sent from SALTA to the "Coronel de Artillería del Ejército Nacional Gerónimo Espejo" in Buenos Aires on 7/MAY/1871, very fine quality! (Image)

RARE DIE ESSAY, circa 1888, image of Juan José Paso with printing number "420" made by the American Bank Note Co. of New York, unadopted design. View 1958 Kneitschel catalog, type II, page 625, very fine quality, very rare! (Image)

GJ.102, 1889 2c. Derqui, 2 die proofs printed on paper with glazed front, one in bright violet (FIRST state, groundwork of horizontal an vertical lines, not adopted and not catalogued by Kneitschel for this paper!) and the other one in redish lilac (second state, adopted), very fine quality, rare lot! (Image)

GJ.111a, 1889 12c. Alberdi printed on BLUISH PAPER, pair franking a cover sent from Buenos Aires to Madrid by steamer "Portugal", arrival backstamp, very fine quality! (Image)

GJ.114, 1889 60c. Posadas, die proof in bright carminish lilac, printed on thin paper affixed to card, very fine quality! (Image)

GJ.183, Belgrano 30c. orange franking alone a registered cover from CHACABUCO to Buenos Aires on 13/AU/1899, very fine quality! (Image)

GJ.183, Belgrano 30c. orange franking alone a registered cover from GANDARA to Buenos Aires on 4/DE/1899, very fine quality! (Image)

GJ.222, 1899 5c. Seated Liberty, 3 blocks of 4 and 3 blocks of 6, all used and with different cancels, some rare such as "EL CALDÉN (PAMPA CENTRAL)", very fine quality! (Image)

GJ.222, 5c. Liberty in block of 8 (total 40c.) franking a registered cover with AR sent from BELGRANO (MENDOZA) to Italy on 23/AU/1901, on back transit mark of B.Aires, with small faults but very rare origin! (Image)

TRAVELING PO CANCELS: 18 fragments of covers with stamps of 5c. Seated Liberty (GJ.222), all with cancels of railway PO, some rare, very fine quality! (Image)

GJ.323, 1911 Plowman 5c., typographed proofs printed by Casa de Moneda in strips of 5 with colored background, on paper, 5 sheets in different color, all with small handstamped "MUESTRA" control mark, excellent quality, rare lot! (Image)

GJ.457, corner block of 4, one with rare variety (defective impression) at bottom left, excellent! (Image)

GJ.463a, 1918 10c. San Martín, block of 4 with COMPLETE DOUBLE IMPRESSION variety, mint lightly hinged, very fine quality! (Image)

GJ.481, 1918 2c. San Martín, block of 18, 14 of them WITH W. Bond watermark (complete!), excellent quality! (Image)

GJ.518, 1920 12c. San Martín with FISCAL SUN wmk, superb example! (Image)

GJ.544CD, 1923 1c. San Martín with sun watermark WITH RIGHT LABEL, MNH (+50%), excellent! (Image)

GJ.556, San Martín 20c. with large sun watermark, block of 30 with cancel of EMBARCACIÓN (Salta), fantastic! (Image)

GJ.595CD, 1924 1c. San Martín w/o period WITH RIGHT LABEL, MNH (+50%), excellent! (Image)

GJ.599CD, 1924 5c. San Martín w/o period WITH RIGHT LABEL, MNH (+50%), excellent! (Image)

RARE BLOCK OF 4: GJ.616, 1924 12c. San Martín printed on RIBBED PAPER, fantastic corner block of 4, MNH (+50%), excellent! (Image)

GJ.739, 2½c. Braille, PROOF in the issued color, imperf pair printed on glazed card, VF! (Image)

GJ.743, 4c. green Guillermo Brown, PROOF in the issued color, imperf block of 4 printed on thick paper of glazed front, VF! (Image)

GJ.744, Moreno 5c., block of 4 with DOUBLE PERFORATION in the left stamps, producing 2 small labels, VF quality! (Image)

GJ.750SG, 12c. Mitre, block of 4 PRINTED ON GUM variety, excellent quality! (Image)