GJ.16, 1st printing imperf, 5c. brick red, dull impression, very ample margins, superb example, signed by Kneitschel on back. (Image)

GJ.21, 10c. clear impression, spectacular example! (Image)

GJ.23, very worn impression, thick paper of 120 microns, very good color, superb! (Image)

GJ.23, used in Buenos Aires on 23/OC/1866, with white spot at left of Rivadavia, very fine quality! (Image)

GJ.23c, with WATERMARK INVERTED variety, and datestamp of CATAMARCA with Maltese cross (+100%), superb, rare! (Image)

GJ.24, 15c. blue, semi-clear impression, mint original gum (+50%), superb! (Image)

GJ.24SD, 15c. dark blue, worn impression, IMPERFORATE (it missed the perforating machine), very fine quality, rare! (Image)

GJ.25a, COMPLETE DOUBLE IMPRESSION var., tied on fragment by straightline Córdoba cancel, superb! (Image)