Ministry of Aircraft Production headquarters staff abridged telephone directory ... August 1943 [cover title]

[London: Ministry of Aircraft Production, 1943. Abridged edition for handy reference, to accompany the full directory "which is now to be issued in June and December only"; 8vo, pp. 43, [1]; printed blue wrappers; some toning, two pages with pen revisions, text clean and sound, very good. A restricted internal directory for the British aeronautics industry and the RAF in the middle of WW-II. Marked restricted, and includes the instructions: "Important, keep conversations short and so reduce delays. Avoid private calls except in emergency. Every available line is required for official purposes. Private calls much be declared as such to the operator... WARNING. Speech on telephones is not secret. (Inventory #: 69503)