1952 - 1990, double mint never hinged and used led collection in separate illustrated pages, except for very few values complete, to 1955 but only used, and in addition to it some stock pages with duplicates, in in total 3 safe illustrated albums. As well has the collector always value on clean circle date stamp put has, with also centered cancellation, the souvenir sheets with first day special cancel, and then from middle of the 60s many with centered cancellation (hand stamp) "Berlin" from of the philatelic agency, as well some first day special cancel, then from 1980 mostly with the clich_s cancels from the subscription.