1907 - 1970 (approximate. ) attractive * / ** / o collection in 3 albums on self-made pages, as well the good souvenir sheets issues souvenir sheet 1 - 15 (all in perfect condition, used), PAX set, from the 50er years abundant blocks of four, sheet margins and so on. As well an album covers / cards / postal stationery, with also first flight and airmail documents, balloon mail and so on.