GJ.20g, 3rd printing, on VERY thin paper (70 microns), also with 2 shades: In the areas where it was gummed (with dark thick gum), it got dyed to a dark coffee color, and below, where the brush did not get to apply the gum, it has its original orangish dun-red shade, superb, very rare, signed by Victor Kneitschel on back. (Image)

GJ.21, 10c. very clear impression, light green, thin paper, with SAN LUIS cancel, superb! (Image)

GJ.23, 10c. worn impression, WITH LEFT SHEET MARGIN and also vertical line watermark, faint blue OM cancel, excellent quality! (Image)

GJ.23, 10c. very worn impression, intense green color, with small spots of plate wear, with rimless datestamp of Concepción del Uruguay in black, excellent! (Image)

GJ.23, 10c. green, worn impression, superb example franking a folded cover from Rosario to Tucumán on 6/JUL/1866, excellent! (Image)

GJ.24, 15c. blue, with variety: ink partially oxidized (with darker shades in the corners), with spectacular CERTIFICADO cancel of Bella Vista, superb! (Image)

GJ.24f, 15c. with PARCHMENT-LIKE PAPER var., very notable, excellent quality, rare. Catalog value US$480, good opportunity! (Image)

GJ.24A, 15c. worn impression, SLATE blue, mint original gum (+50%), superb, very rare! (Image)

GJ.25a, 4th printing, very notable COMPLETE DOUBLE IMPRESSION var., staring at it for a few moments produces a rare psychedelic effect that could cause a headache or other issues, spectacular! (Image)

RARE COMBINATION OF VARIETIES: GJ.25Ba, 4th printing, lilac-rose and MULATTO, also DIRTY PLATE horizontally, very rare, excellent quality! (Image)

UNUSUAL COMBINATION OF VARIETIES: GJ.25Ba, 4th printing in notable lilac-rose color, also mulatto, with partial double impression (left side), and vertically dirty plate, superb, very rare! (Image)

GJ.26c, 5th printing, INVERTED WATERMARK (reversed), superb, rare! (Image)

GJ.26d, 5th printing, VERY THIN PAPER, used in Rosario, superb and very rare! (Image)

GJ.26g, 5th printing, with variety "Bottom left angle incomplete" (position 19), superb quality, rare in this printing! (Image)

GJ.28c, 6th printing, with INVERTED WATERMARK variety (reversed), very rare, with Alberto Solari certificate, low start! (Image)

GJ.33a, 7th printing perforated, COMPLETE DOUBLE IMPRESSION variety, splendid, with perforations on the 4 sides (on the left they are barely impressed, and the scissors cut is outside the perforations!), exceptional quality! (Image)