1920-1935. Cancelled collection on pages, supplemented considerably at covers. No. 30 on on piece in outstanding quality expertized Burger BPP, certificates Geigle respectively Ney BPP for no. 128-33, 151-57, 161-67 as well for no. 144-50 on cover. Photo expertize Ney BPP for letter with no. 199-205. Very nice collection.