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Early ENIGMA Papers, all undated. Peter TWINN: ENIGMA (General). FOSS' system of...
Catalogue reference: HW 25/9
What’s it about?
This record is about the Early ENIGMA Papers, all undated. Peter TWINN: ENIGMA (General). FOSS' system of... dating from 1933 Jan 01-1943 Dec 31 in the series Government Code and Cypher School: Cryptographic Studies. It is held at The National Archives, Kew.
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Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
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HW 25/9
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Date (When the record was created)
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1933 Jan 01-1943 Dec 31
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Description (What the record is about)
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Early ENIGMA Papers, all undated. Peter TWINN: ENIGMA (General). FOSS' system of rectangles. Explanation of keys of the ENIGMA Cipher machine (translation from German). Directions for use of keys on the cipher machine ENIGMA I (translation from German). ZYKLOMETER schematic. Notes on the Signal Experimental Establishment (SEE) test set
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Held by (Who holds the record)
- The National Archives, Kew
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Legal status (A note as to whether the record being described is a Public Record or not)
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Public Record(s)
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Closure status (Whether the record is ‘open’ (available to the public) or ‘closed’ (not available due to a legal exemption))
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Open Document, Open Description
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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- Topics
- Research
- Intelligence
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C10924821/
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Series information
HW 25
Government Code and Cypher School: Cryptographic Studies
See the series level description for more information about this record.
Catalogue hierarchy
Over 27 million records
This record is held at The National Archives, Kew
17,110 records
Within the department: HW
Records created or inherited by Government Communications Headquarters (GCHQ)
42 records
Within the series: HW 25
Government Code and Cypher School: Cryptographic Studies
You are currently looking at the piece: HW 25/9
Early ENIGMA Papers, all undated. Peter TWINN: ENIGMA (General). FOSS' system of...
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