Auction catalogs: Köhler, lot with more then 35 mostly special catalogs the 80s / nineties till 2001, into the bargain special catalog Potsdam-people philatelic office collection Augusta (Prussia collection family Grobe, Hanover) from 2012, by the Köhler catalogues amongst other things complete set "Boker", collection Rapkin breast shields, collection large Austria, Raritätenkataloge etc., interesting equipment.