William F. Friedman NSA Archive - Report, Brochure, and Photographs of the Hand-Driven Ciphering Machine, Type Hc-4, 1954 - 4in1

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Files W.F.F. Archive Publications Report, Brochure, and Photographs of the Hand-Driven Ciphering Machine, Type Hc-4, 1954

Hand-Driven Ciphering Machine

Document A60192