GJ.19, 2 VERY BLURRED examples on fragment, tied by ROSARIO cancel 30/JUL/64, excellent quality! (Image)

GJ.19a, 1st printing, with very notable COMPLETE DOUBLE IMPRESSION, and a paper fold, excellent and very rare! (Image)

GJ.19N, splendid example of 1st printing with extremely clear impression, and complete borders perforated all around, franking an entire letter sent from Rosario to San Pedro on 1/MAY/1865, fresh, perfect, absolutely superb! (Image)

GJ.19o, 1st or 2nd printing, with variety "spot on the temple", position 88 on plate B, excellent quality! (Image)

GJ.20, on fragment cancelled Buenos Aires 5/JUL/65, superb! (Image)

GJ.20, 3rd printing, fantastic example with VERY CLEAR impression, complete borders perforated all around, franking an entire letter from Rosario to San Pedro on 29/MAY/1865, fresh, perfect, fantastic quality! (Image)

GJ.21, 10c. clear impression, superb example on fragment with Rosario cancel, excellent quality! (Image)

GJ.23, 10c. worn impression, very fine quality! (Image)

GJ.23, 10c. worn impression, 5 examples in different shades, VF quality, nice group! (Image)

GJ.23, 10c. worn impression, excellent quality! (Image)

GJ.23SD, 10c. clear impression, imperforate (it escaped the perforating machine), mint, VF quality! (Image)

GJ.23SD, 10c. worn impression, IMPERFORATE (it escaped the machine), very fine quality! (Image)

GJ.24, 15c. worn impression, mint without gum, VF quality! (Image)

GJ.24, 15c. worn impression, imperforate (trimmed margins, or it could have escaped the perforating machine, GJ.24SD), VF! (Image)

GJ.24, 15c. blue, mint, with a small natural vertical paper wrinkle, extremely fine quality! (Image)

GJ.24, 15c. dull impression, superb example! (Image)

GJ.24, 15c. worn impression, with attractive dry impression due to lack of ink in the top-left area, used in Buenos Aires on 15/JUL/1866, VF quality, signed by Victor Kneitschel on back (Image)

GJ.24g, 15c. worn impression, printed on VERY THIN PAPER (80 microns), used in Córdoba, excellent quality! (Image)

GJ.24A, 15c. green-blue, beautiful example! (Image)

GJ.25, 4th printing, with extremely rare receiving cancel of TACUAREMBÓ (Uruguay), "ribbon with sun" in black, extremely rare, with Alberto Solari certificate (Image)

GJ.34, 8th printing, with a very rare cancel of Santa Fe: blue FRANCA in double ogive, extremely rare and possibly unique for this printing, with Alberto Solari certificate (Image)

GJ.E10, 1862 5c., proof printed in London, semi-clear impression, plate A, with thins on back but of excellent front! (Image)

GJ.E16, 1863 proof printed in London, 15c. blue, clear impression, printed on lightly grayish paper, thins on back, superb front, rare! (Image)

GJ.E18, 1864 proof printed in Buenos Aires, 5c. very clear impression, plate A, with variety: "top part of the left frame missing", excellent! (Image)

GJ.E19, 1864, proof of excellent quality! (Image)