GJ.HB 20, 1966 Philatelic Meetings of the River Plate, 4 TRIAL COLOR PROOFS printed on paper with gum and watermark, VF quality! (Image)

GJ.HB 120Pa, 1999 Paintings, with variety: Top stamp IMPERFORATE, MNH, excellent quality! (Image)

GJ.HB 120Pa, 1999 Paintings (Antonio Berni), with variety: top stamp IMPERFORATE, MNH, VF quality and very rare (not yet catalogued) (Image)

GJ.HB 124, 1999 Jorge Luis Borges (writer) with VARIETY: Silver color very shifted, on cover with first day postmark, VF and rare! (Image)

GJ.HB 129, Libraries, with VARIETY: "Very shifted text in braille (embossed), instead of being on the normal stamp (GJ.3039) it is strongly shifted to the right and partially on the neighboring stamp", along normal example for comparison, excellent quality, rare variety! (Image)

GJ.HB 137P, 2001 Japan Philatelic Exhibition (tango and Kabuki theater), IMPERFORATE variety, MNH, excellent quality, rare. Along normal example for comparison (Image)

GJ.HB 158, 2004 Station and post office in Orcadas, with VARIETY: Perforation dramatically shifted to the right, spectacular and rare. Along normal example for comparison. (Image)