GJ.38, 5c. Rivadavia, groundwork of crossed lines, on letter sent from Mendoza to Rosario on 21/AP/1870, with transit mark of San Luis, VF (Image)

GJ.38, 5c. Rivadavia, groundwork of crossed lines, on letter sent to Rosario in MAY/1871, with oval CORREO NACIONAL DEL MORRO with FRANCA, some spots produced by the oil of adhesive tape, rare! (Image)

GJ.65a, 12c. Little Envelope, perf 14¼, variety "2 without serif", used, VF (Image)

GJ.84PH, 5c. Rivadavia, vertical pair imperforate between, defects (Image)

GJ.98, 1c. Vélez Sarsfield, proof in dun (issued), on card, VF (Image)

GJ.110, 10c. Avellaneda, proof in green, on card, VF (Image)

90c. Saavedra, unadopted design, essay in brown on card, VF (Image)

90c. Sudamerica issue (unissued), essay in blue, printed on thin translucent paper, VF quality (Image)

GJ.127, 5c. Rivadavia, type III, perf 11¼x12, used, VF (Image)

GJ.136, 5c. Discovery of America 400 years, proof in blue, on card, VF (Image)

GJ.146, 24c. Belgrano, proofs in black and rose, on thin transparent paper, VF (Image)

GJ.146, 24c. Belgrano, proof printed in blue on glazed card, block of 4, VF quality (Image)

GJ.150, 2P. San Martín, proof printed in violet on opaque card, block of 4, VF (Image)

GJ.150, 2P. San Martín, proof printed in bluish black-gray on glazed card, block of 4, VF (Image)

GJ.151, 5P. San Martín, proof printed in light green on glazed card, block of 4, VF (Image)

GJ.151, 5P. San Martín, proof printed in dun on glazed card, block of 4, VF (Image)

GJ.151, 5P. San Martín, proof printed in blue on glazed card, block of 4, VF (Image)

GJ.167, 5c. Rivadavia, small sun wmk, perf 12x11½, used, VF (Image)

GJ.174, ½c. Rivadavia, large sun wmk, perf 11½, 1 block of 6, 2 blocks of 4 and 3 singles in varied shades, VF (Image)

GJ.176, 2c. Rivadavia, large sun wmk, perf 11½, several examples in varied shades, VF (Image)

GJ.177, 3c. Rivadavia, large sun wmk, perf 11½, strip of 5, strip of 6 and block of 4 in different shades, VF (Image)

GJ.178, 5c. Rivadavia, large sun wmk, perf 11½, 4 blocks of 4 printed in different shades and single in rare cerise color, superb quality (Image)

GJ.190/2, ½c, 1c and 2c. Rivadavia, large sun wmk, perf 12¼, VF (Image)

GJ.193, 3c. Rivadavia, large sun wmk, perf 12¼, VF (Image)

GJ.197, 16c. Belgrano, large sun wmk, perf 12¼, small adherence on back (Image)