GJ.16, 1859 4R. dark green, very worn and inky impression, with the lower inscription virtually invisible, 4 margins, very fresh and attractive! (Image)

GJ.16, 4R. green, dull impression, with variety "frame line broken at bottom right", minor defect on reverse in the hinge area, superb front, catalog value US$200+ (Image)

GJ.16, 4R. green, dull impression, very nice stamp with variety: frame line broken at top right, with minor defect on reverse in the hinge area, superb front! (Image)

GJ.17, 1P. blue, dull impressions, 5 examples with shading color: light blue, azure, blue, greenish blue and dark blue, very good lot! (Image)

GJ.17, good lot of 19 used stamps, wide range of shades (from light blue to almost indigo), cancels and impression (from almost clear to very blurred), some with small defects, several of excellent quality, very interesting! (Image)

GJ.17c, with variety "1 without period", VF (Image)

GJ.17c, notable light blue color, "1 without period" variety, VF quality! (Image)

GJ.17b, 1P. blue, worn impression, with variety "1 without period", and an interesting PLATE CRACK at bottom (line below "AIRES"), very interesting. Thin on reverse, superb front! (Image)

GJ.17i, with variety "top right angle defective" (position 12), with repaired tear, excellent appearance! (Image)

GJ.17, with "BUENOS : AIRES" variety, mint original gum, attractive! (Image)

GJ.17, notable stamp with 2 varieties: "Dot above the second R of CORREOS" and "Partial double impression on left border" (it also shows a rare almost black impression of the left frame), very fine quality! (Image)

GJ.17, 1P. dark blue, worn impression, with very interesting variety at top over "CORRREOS", minor defect on reverse, very good front, rare! (Image)

GJ.17A, 1P. light milky blue, nice used example, good opportunity! (Image)

GJ.18, 2P. red, semi-clear impression, 2 examples of 4 complete margins on a small fragment with dotted cancel of Buenos Aires, VF quality, catalog value US$240+ (Image)

GJ.18, 2P. red, dull impression, with VARIETIES: 3 last letters of 'PESOS' incomplete at top and flaw in the background above the head, wide margins, excellent quality, catalog value for a normal example US$120. (Image)

GJ.20, 2P. light blue, clear impression, used, VF (Image)

GJ.21, 1P. rose, semi-clear impression, mint, very wide margins, with variety "top frame line crushed", tiny pin hole, very good front! (Image)

GJ.21, 1P. rose, with a cancel not known until today: "CORREOS DE LA ENSENADA Y DE LA BOCA", in blue circle, great rarity and a recent find! (Image)