Qustion of substitutions a Mechanical System of Cyphering. Minutes of a Meeting head at the Treasury on the 8th March 1928 by the Inter-departmental Committee on Cypher Machines

Keywords Mr. Wakely's
Air Force
Signal Department
Ministry/ Department/ Residency Foreign and Political
Branch Central Cypher Bureau
From Year / Date
(YYYY-MM-DD)
1931
To Year / Date
(YYYY-MM-DD)
1931
Identifier PR_000004050908
File No./Reference No./Sheet No./Folio No. 3A
Location Repository-3
File Size 35.5 MB
Pages 19
Collection Digitized Public Records
Foreign and Political
Language English
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