GJ.20g, 3rd printing, on thin paper (90 microns), notable very orangish dun-red color, and with line watermark, superb! (Image)

GJ.20j, 3rd printing, MULATTO variety, tied on fragment by Rosario cancel, excellent quality! (Image)

GJ.21b, 10c. clear impression, dark green, THIN PAPER (90 microns), superb and rare! (Image)

GJ.26, 5th printing, with double circle SAN JUAN cancel, superb! (Image)

GJ.33, splendid and striking example from 7th printing perforated, CLEAR IMPRESSION (very rare!), with left sheet margin and COMPLETE PERFORATIONS in the 4 sides, excellent quality and extremely rare! (Image)