GJ.HB 6, 1939 UPU Congress, block of 4 sheets, MNH, superb! It is rare to find an example without hinges or staining, VF quality! Catalog value US$65 + 50% (MNH) (Image)

GJ.HB 6/7, 1939 UPU Congress, blocks of 4 sheets (both formats), with postmarks of the exposition, very fine quality! (Image)

GJ.HB 14, EFIRA exposition (stamp designs), PROOF on opaque paper, unadopted colors, VF, rare! (Image)

GJ.HB 20a, 2nd Philatelic meetings, FLAGS OMITTED variety, superb! (Image)

GJ.HB 225P, 2011 Copa América football cup (Argentina-Bolivia) IMPERFORATE variety, very rare and not yet catalogued (it will be included in the next edition, with a value of S$400), fantastic! (Image)

GJ.HB 251P, 2015 Argentina expedition to the South Pole, IMPERFORATE, excellent quality, very rare and thematic: Antarctica, maps, dogs! (Image)