GJ.3, blue, with DEFECTIVE IMPRESSION variety (part of the stamp is unprinted!), pen cancelled, very attractive! (Image)

GJ.4, yellow-green, with PRINTING FLAW at left of the forehead, on fragment with attractive pen cancel, excellent! (Image)

GJ.6, yellow, with INCOMPLETE IMPRESSION at top (due to lack of ink), excellent! (Image)

GJ.6, yellow, complete sheet of 32 stamps in 4 groups of 8 (disposition I, the top examples in normal position and bottom stamps inverted), both bottom groups printed DIAGONALLY, also the top groups are shifted to the right (2 stamps are incomplete), and the example at position 8 in the top right group with variety "WITHOUT BOTTOM RECTANGLE" (GJ.6b), excellent and very rare! (Image)

GJ.7, dark blue, with PARTIAL DOUBLE IMPRESSION variety (left side), tiny thin on back (almost invisible and insignificant), very nice, rare! (Image)

GJ.9, dark rose-lilac, fantastic example with VARIETY: "CO RIENTES", excellent quality, very rare! (Image)

GJ.8b + 8, dull rose, vertical pair formed by types 4-8, the top stamp with variety "WITHOUT TOP RECTANGLE", pen cancelled, VF and very rare! With Alberto Solari certificate (Image)

GJ.15, dark lilac, with variety "DIM IMPRESISON", and violet pen cancel, excellent quality, rare! (Image)