Die proof for "San Martin in medalion" envelopes, cards and wrappers of 1908, WITHOUT VALUE, in black, printed on card, not described by Kneitschel (he describes other examples in page 898 of his 1958 catalogue, volume II, but all of them have face value), excellent quality, extremely rare! (Image)

Year 1951, 4 Years of Perón Administration, unissued ESSAY printed by Casa de Moneda on thin card, excellent quality, very rare! (Image)

GJ.1/4, 1980 Philatelic Exposition Buenos Aires 80, cmpl. set of 4 postal cards, mint, excellent quality! (Image)