Auction # 2432 WORLDWIDE + ARGENTINA: Special August auction

Book gifted to the delegates of the XI UPU Congress held in Buenos Aires, held in April 1939. It includes stamps of the issue Próceres & Riquezas I even the high values, the Sarmiento and UPU sets of 1939, etc. Some of the stamps are printed on AUSTRIAN paper (rare), for example: GJ.761U, 764U, 765U and 820U, the catalog value of the stamps is US$550+, all of very fine quality, rare book, low start!