List of British Airworthy Engines. Issue No.4 / R.D.E., Air Ministry. 1936. [17 blueprint sheets containing the type data of all normal category engines approved for use in British Aircraft. They were issued in groups identifiable by reference to the constructor's name and the code marking entered at top right hand corner of each sheet. 14 companies are named] List of British Airworthy Engines. Issue No.4 / R.D.E. 1936
Compass type 06A, made by the Air Ministry, 1940-1955, serial number 33274A, for handheld use on the ground, stored in original wooden box painted RAF blue. Compass issued by the Air Ministry 1940-1945