Receipt and distribution of Foreign Office Cyphers Political 'A' and 'B' commercial 'A' and 'B', Political 'A2' and 'B2', Starting Groups and Recyphering Tables D1 and D2, and correction to M 1921 and special reference Cypher. Destruction of Foreign Office Cypher Codes E 1919, I 1919 and N 1920 Political 'A' and Commercial 'B'. Discontinuance of the use of Foreign Office Cypher 'V' 1919
| Keywords | Foreign Office Cypher Code Tehran C.G. Adam |
| Department | Foreign and Political |
| Branch | Cypher Confidential |
| From Year / Date (YYYY-MM-DD) |
1923 |
| To Year / Date (YYYY-MM-DD) |
1923 |
| Identifier | PR_000004050774 |
| File No. | Jan-30 |
| Location | Repository-3 |
| File Size | 80.7 MB |
| Pages | 63 |
| Collection | Digitized Public Records Foreign and Political |
| Language | English |
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