1928 - 1938, very extensive collection with approximate 1800 first flight covers and others special covers (little other documents) with a wealth at various flights, special Cachet, some documents with "catch-cry" postmarks, special Cachet on the subject of military and navy, various printed form covers including many different to the "inland Air Races 1929", margin copies with plate numbers and further special feature, almost continuously very fine, together in 20 albums, in this quantity hardly once offered!