GJ.21, 1P. dull rose, worn impression, unused, without gum, with thin on back, nice front (Image)

6 Stamps with forged cancels, interesting for study! (Image)

GJ.5A, 2c. bottle green, type 8, tied on fragment by dotted ellipse cancel, VF quality (Image)

GJ.10, 5c. dull rose, without accent, VERY CLEAR IMPRESSION, with Rosario cancel (Image)

GJ.12, 5c. carmine-rose, without accent, semi-worn plate, used, VF quality (Image)

GJ.96 + other values, Sudamericana issue, sheet of an old collection with 20 proofs in different colors, including for example 8c. cerise-carmine and 9 unissued values, VF quality (Image)

GJ.96, ¼c. José María Paz, complete sheet of 100 stamps, VF (Image)

GJ.113, 50c. Mitre, DIE PROOF in blue, thin paper glued to card, VF quality (Image)

GJ.115, DIE PROOF of portrait of San Martín (part was used to illustrate the 1P. stamp), glued to page of a book of specimens of Compañía Sudamericana de Billetes de Banco, extremely rare and only one known! (Image)

GJ.118MU, 20P. Brown, with "MUESTRA" overprint, VF (Image)

GJ.148MU + 150MU + 151MU, 1, 2 and 5P. San Martín, with "MUESTRA" ovpt., unused without gum, VF (Image)

GJ.150, 2P. San Martín, small sun wmk, perf 11½, very nice (Image)

GJ.151MU, 5P. San Martín, small sun wmk, perf 11½, with "MUESTRA" ovpt., unused, without gum, VF (Image)

GJ.185, 80c. Belgrano, large sun wmk, perf 11½, with "MUESTRA" ovpt., unused without gum, light crease (Image)

GJ.187, 1.20P. San Martín, large sun wmk, perf 11½, VF (Image)

GJ.231 + 232 + 233, 30c. Seated Liberty, in rose, dull vermilion and bright red (unused, without gum), VF quality (Image)

GJ.237, 10P. Seated Liberty, used, VF (Image)

GJ.238, 20P. Seated Liberty, with "MUESTRA" ovpt., VF (Image)

GJ.275b, ½c. San Martín, with and without watermark, pair, VF (Image)

GJ.297, 24c. San Martín, perf 13¼, block of 4, VF (Image)

GJ.299a, 1P. San Martín, perf 13¼, without watermark, VF (Image)

GJ.330b, 3c. Plowman, with and without straight rays wmk, pair, VF (Image)

GJ.332a, 10c. Plowman, without watermark, VF (Image)

GJ.344, 12c. Plowman, German paper with vertical honeycomb wmk, 2 blocks of 4 printed in different shades, with sheet corner, VF (Image)

GJ.362, 20P. Plowman, horiz honeycomb wmk, used, VF quality, rare! Signed by Kneitschel (Image)