ASO. GJ.40, DIE PROOF of the 50c. value in red, printed on card with opaque front, VF quality, very rare! (Image)

ASO. GJ.684, pair originally PRINTED ON GUM, used, when it was soaked to be removed from the cover it lost a large part of the impression, very rare variety, only this pair and a strip of 4 are known! (Image)

ASO. GJ.775A, 300P. Mar del Plata, block of 4 printed on national unsurfaced paper (UV neutral), along a normal example for comparison (national chalky paper, lightly fluorescent), MNH, VF quality, rare! (Image)

ASO. Front of cover sent by the Banco Agrícola del Paraguay in Asunción to Argentina on 23/MAY/1897, franked with 10c. (Sc.O37), VF and rare! (Image)

ASO. Sc.O21 in mint block of 32 (almost all MNH) and another used block of 15, also Sc.O22 in mint blocks of 20 and 16, Sc.O24 in block of 19 and Sc.O26 in block of 8, mint. Some with minor defects, most of fine to excellent quality! (Image)

ASO. Small group of 5 old stamps with overprint VARIETIES, very nice! (Image)