GJ.38, Rivadavia 5c. franking an entire letter sent to Córdoba on 13/DE/1871, with mute "pigeons" cancel along datestamp of SAN LUIS with Maltese cross, VF quality! (Image)

GJ.44, 90c. Saavedra, large used block of 25 stamps (with bulk mail cancellation), excellent quality, rare! (Image)

GJ.49, Rivadavia 8c. rouletted, on a cover sent to Buenos Aires on 8/MAR/1879, with very nice double circle cancel of CORRIENTES, several backstamps, very attractive! (Image)

GJ.49, 1876 Rivadavia 8c. rouletted, 32 examples franking an entire letter dated "La Delfina 2/AP/1879" and dispatched from BRAGADO to Buenos Aires on 7/AP, with arrival mark of the following day, superb! (Image)

GJ.51, 1876 20c. Velez Sársfield rouletted, franking ALONE a registered cover used in Buenos Aires on 14/NO/1883, excellent quality and very rare (very few known covers), with Alberto Solari certificate (Image)

GJ.60, position 10 (top right corner of the sheet), with a guide cross drawn in pencil and with variety very shifted overprint (without "PR"), excellent quality! (Image)

GJ.73b, with INVERTED overprint variety, also bluish paper, VF! (Image)

GJ.80, 1888 ½c. Urquiza, pair with DOUBLE vertical perforation, and the right stamp with variety "Accent over A of CENTAVO", VF quality! (Image)

GJ.84PH, vertical pair IMPERFORATE BETWEEN, excellent quality, rare! (Image)

GJ.84, 1888 5c. Rivadavia with DOUBLE VERTICAL PERFORATION, excellent and rare! (Image)

GJ.89, 1888 20c. Roca, used block of 6, the bottom stamps with LARGE PAPER FOLD, very notable. With tiny fault in one corner, VF general quality, rare variety in this issue! (Image)

GJ.91A, 1888 30c. Dorrego CHOCOLATE color, mint without gum, with sheet margin, excellent and rare! With Alberto Solari certificate (Image)

GJ.95 + 95A, 1888 40c. Moreno perf 12, slate and greenish black, mint without gum, VF quality, catalog value US$500, low start! (Image)

GJ.96, 1889 ¼c. Paz, proof in light yellowish green, large block of 24 with left sheet margin with printer imprint, VF quality! (Image)

GJ.98P, 1c. Velez Sársfield, IMPERFORATE PAIR, VF! (Image)

GJ.99, 1c. Velez Sársfield with "Globes" WATERMARK, mint lightly hinged, very visible watermark, superb! (Image)

GJ.105, 1889 5c. Rivadavia large head, proof in ultramarine, block of 12 with left sheet margin with printer imprint, VF quality! (Image)

GJ.109P, 1889 8c. Rivadavia, IMPERFORATE PAIR, MNH (+50%), superb! (Image)

1889, Sudamericana issue, die essay of an unissued 25c. value, rare! (Image)

GJ.113, 1889 50c. Mitre, proof in dark lemon yellow, large block of 20 stamps with left sheet margin with printer imprint, VF quality! (Image)

GJ.114P, 1888 60c. Posadas, IMPERFORATE PAIR, very nice! (Image)

1889 Sudamericana issue, unadopted essay of 2P., proof in very dark brown, block of 4 printed on thin paper, excellent! (Image)

GJ.116, 1889 5P. Lamadrid, proof in dark brown, block of 4 printed on thin paper, excellent! (Image)

GJ.118, 1889 20P. Brown, proof in orangish red, block of 4 printed on thin paper, excellent! (Image)

GJ.118A, 1888 20P. Brown, mint with sheet margin, very fresh, excellent. Also with VARIETY: "line below the RR of CORREOS", rare! (Image)