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Catalogue description Cypher machines: cypher communications from Spain; safe custody of secret and...
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| Reference: | FO 850/4 |
|---|---|
| Description: |
Cypher machines: cypher communications from Spain; safe custody of secret and confidential papers calculated by the Foreign Office; reorganisation of the Communications Department. Code 650 file 437 456 909 1636 |
| Date: | 1939 |
| Held by: | The National Archives, Kew |
| Former reference in its original department: | 437 456 909 1636 |
| Legal status: | Public Record(s) |
| Closure status: | Open Document, Open Description |
| Access conditions: | Closed Until 2006 |
| Record opening date: | 02 November 2006 |
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