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Catalogue description German Naval Intelligence successes against Allied cyphers, prefixed by a general survey...
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| Reference: | HW 40/7 |
|---|---|
| Description: |
German Naval Intelligence successes against Allied cyphers, prefixed by a general survey of German Sigint |
| Date: | 1939 Jan 01 - 1945 Dec 31 |
| Held by: | The National Archives, Kew |
| Legal status: | Public Record(s) |
| Closure status: | Open Document, Open Description |
| Access conditions: | Retained Until 2003 |
| Record opening date: | 21 August 2003 |
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