The sixth issue of this excellent periodical containing colour-illustrated articles on forgeries by world experts. Contents include Identification of Covers with Sinkiang Provisional Airmail Stamps – Formation of the Northwest Airline and the issuance and use of Sinkiang provisional airmail stamps, by David Lu; Alpenvorland Adria, by Ganse; Wondrous Transformations (continued from FFE No.1) by Karl-Albert Louis; etc, etc.