Auction # 2321 ARGENTINA: Selection of VARIETIES!!

INCREDIBLE VARIETY: GJ.1306A, 8P. San Martín printed on soft imported unsurfaced paper, pair, the right stamp with "CORRROS" inscription. It is NOT a printing error, but an error in the design of the stamp, probably repeated in part of the issue in a specific place of each sheet, unknown variety until now and possibly corrected during the issue and very few examples probably exist (I don´t recall seeing a similar example before!)