Buildings - most interesting inventory with approximate 300 small-format documents, all with useful frankings, specific postmarks or note. As well many special dispatching forms like registered, special delivery, airmail and C.o.d.-letters, in addition to it censorship- and court letters, package, cash on delivery and international postcards with frankings to 5 DM, mixed frankings with Federal Republic of Germany and Berlin special stamps and posthorn permanent issues values, as well further special feature!