GJ.1, 1856 Un Real M.C. blue, type 5, the top frame "crushed" over the letters, with pen cancel of Curuzú Cuatiá, excellent quality! (Image)

GJ.1, 1856 Un Real M.C. blue, type 6, pen cancelled, excellent quality! (Image)

GJ.2, 1860 provisional with goose quill stroke through the value, with pen cancel of Trinchera de San José, excellent quality, signed by Solari on back. (Image)

GJ.3, blue, MNH pair formed by types 7 and 8, with its original brown gum intact and perfect (+200%), superb! (Image)

GJ.3, blue, with part of the impression missing, pen cancelled in Goya, superb, rare! (Image)

GJ.4, yellow-green, type 2, with pen cancel of Bella Vista, superb! (Image)

GJ.5, bluish green, with arch CORRIENTES cancel, very fine example, rare! (Image)

GJ.5A, bottle green, with pen cancel of Corrientes, excellent quality, rare! (Image)

GJ.6c, yellow, very rare incomplete impression (without lower box), mint, VF quality! (Image)

GJ.7, dark blue, with notable pen cancel of Curuzú Cuatiá, excellent! (Image)

GJ.7T, dark blue, pair forming a tete-beche, superb! (Image)

GJ.8, dull rose, rare very oily impression, pen cancelled in Caa Catí, superb! (Image)

GJ.8A, rose-lilac, with VIOLET pen cancel of Corrientes, superb and rare! (Image)

GJ.11, lilac-rose, with datestamp of Corrientes, VF quality! (Image)

GJ.13, redish lilac, pen cancelled, very fine quality! (Image)

GJ.16T, dull rose, pair forming a tete-beche, mint with full original gum, superb! (Image)

GJ.17, magenta, with pen cancel of Trinchera de San José, rare, very fine quality! (Image)