GJ.4, mint without gum, very fine quality, signed by Victor Kneitschel on back (Image)

GJ.5, mint without gum, fine quality, signed by Victor Kneitschel on back (Image)

GJ.27, mint without gum, fine quality, rare! (Image)

GJ.38, 1901 10c. Liberty head, complete sheet of 50 stamps, MNH (3 stamps and part of the sheet margin with small stain spots), in general of very fine quality, rare! (Image)

GJ.255, 1925 2c. San Martín w/o period with M.H. overprint, MNH (+50%), excellent quality, very rare! (Image)

GJ.633, 3c. San Martín with large sun watermark, large block of 160 probably used on parcel post, LARGEST KNOWN MULTIPLE, with minor defects but of excellent appearance, good opportunity! (Image)