1864: Rivadavia 10 C. green with watermark and clear impression showing clear to large margins all round (light horizontal file fold), a fresh example tied by oval grill obliterator to entire from Victoria with hand written date "Agosto 4 1864" inside, sent to Buenos Ayres. WE ONLY RECORD THE FOLLOWING FIVE COVERS WITH THIS RARE STAMP: 1) the cover offered here 2) "OM" on earliest recorded date cover (24.4.1864) from Buenos Aires to Rosario; Falzaresi collection 3) cancelled "OM" to Goya; Llach P.T sale of Argentina 1973 lot 414 4) cancelled "CORREOS SANTIAGO DEL ESTERO" sent to Cordoba; ex Jewell and Mercedes 5) "GUALEGUAY" cds on cover to ? ex Lee collection (1935) lot 456 Cert. Philatelic Foundation and Brian Moorhouse. Scott = $ 16'000. Provenance: Joseph Schatzkes Collection; Llach Barcelona private treaty list 1973 item 415; Norman Hubbard Collection. (Image)

1864: Rivadavia 10 C. green, wide margins, imperforated, color fresh luxury piece, unused without gum, a rare stamp! Certificate Brian Moorhouse (2011). ÷ Rivadavia 10 C. grün, allseits breitrandig, ungezähntes, farbfrisches Luxusstück, ungebraucht ohne Gummi, eine seltene Marke! Fotoatteste Brian Moorhouse(2011). (Scott 9, SG 6, Yv 9) (Image)

1917: General San Martin 20 P. blue redpurple, INVERTED CENTERPIECE, unused (position 48) with lower margin of sheet. An extremely rare stamp, only 12 unused copies are known. Certificate Mautalen / Pedret. ÷ General San Martin 20 P. blau/rotlila, KOPFSTEHENDES MITTELSTÜCK, ungebrauchtes Exemplar (Position 48) mit unterem Bogenrand. Eine äußerst seltene Marke, nur 12 ungestempelte Exemplare sind bekannt. Fotoattest Mautalen/Pedret. (Sc 246a; Yv. 226a) (Image)