Gyro-magnetic compass, Mark III, consisting of: 1) Detector 2) Master indicator 3) Pilot's compass 4) Control panel 5) Amplified, used in aircraft navigation, by H. Hughes and Son Limited, England, 1930-1947 Gyro-magnetic Compass 1930-1947
Q.E. Corrector/A.E. Matching Unit, type 2465A, serial no.541 by Marconi International Marine Communications Company Limited, London, England, 1962-1963. Connects the lodestar D/F receiver (1963-17) to the fixed loop aerial (1963-19). Q.E. Corrector/A.E. Matching Unit 1962-1963