Auction #1944 ARGENTINA: Splendid selection of "Rivadavias"

GJ.25c, 4th printing, with INVERTED WATERMARK variety, very worn impression, thin paper (80 microns), with DOUBLE cancellation: rimless datestamp of Concepción del Uruguay and circular datestamp of Buenos Aires for 25/AU/66, also vertical line watermark at right (sheet border), it has a tiny thin on back almost insignificant, very beautiful front, very rare!