URUGUAY - Air Mail. 1921-29, very nice collection, on 9 exhibition pages describing early air mail issues with their printing settings, varieties, including Albatross perforated 1928 and Pegasus 1929 issue all very lightly hinged. In addition 13 covers with different flight cancellations to domestic and foreign destinations. Viewing recommended. (Photo). Est. 200 - 300 CHF.