Germany. An Rlb (Air Raid Protection League) Visor Cap Eagle Auction Footnote: The Fairbairn Sykes Fighting Knife Footnote: The Fairbairn Sykes Fighting Knife is a double edged fighting knife resembling a dagger or poignard with a foil grip developed by William Ewart Fairbairn and Eric Anthony Sykes in Shanghai based on concepts which the two men initiated before the Second World War while serving on the Shanghai Municipal Police in China and with original signature of the General der Flieger Gustav Kastner Kirdorf the reverse with all three crimped prongs in place one with hot glue remains from previous collector’s mounting with a black painted eagle