Stores reference 6F/162 (tubes), 6F/154 (receivers). Used for communication between pilot and co-pilot, usually within biplane cockpits. The fabric covered flexible metal tubes are in very good condition bar some fraying and minor distortion at the end of one. The earpieces are of the smaller bakelite and white metal type, each marked with A.M. King's crown and reference numbers. Very good used condition overall. Stock code H22879.