Piece
Accessions administration: HW 25
Catalogue reference: PRO 57/15756
Date: 1999 Jan 1 - 2004 Dec 31
Accessions administration: HW 25
Piece
Account of the methods used for breaking German teleprinter cypher messages
Catalogue reference: HW 25/4
What’s it about?
This record is about the Account of the methods used for breaking German teleprinter cypher messages dating from 1941 June 01-1945 June 30 in the series Government Code and Cypher School: Cryptographic Studies. It is held at The National Archives, Kew.
Is it available online?
No, this record is not available online. However, you can order a copy. Other ways to view it.
Can I see it in person?
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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)
- HW 25/4
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Date (When the record was created)
- 1941 June 01-1945 June 30
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Description (What the record is about)
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Account of the methods used for breaking German teleprinter cypher messages
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Held by (Who holds the record)
- The National Archives, Kew
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Former department reference (Former identifier given by the originating creator)
- GENERAL REPORT ON TUNNY VOLUME I
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Legal status (A note as to whether the record being described is a Public Record or not)
- Public Record(s)
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Access conditions (Information on conditions that restrict or affect access to the record)
- Closed Until 2000
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Closure status (Whether the record is ‘open’ (available to the public) or ‘closed’ (not available due to a legal exemption))
- Open Document, Open Description
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C10905625/
How to order it
- View this record page in our current catalogue
- Check viewing and downloading options
- Select an option and follow instructions
Series information
HW 25
Government Code and Cypher School: Cryptographic Studies
See the series level description for more information about this record.
Catalogue hierarchy
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Account of the methods used for breaking German teleprinter cypher messages
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