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• Catalogue level

  Piece

  Accessions administration: HW 38

  Accessions administration: HW 38

  Held by

  The National Archives, Kew

  Date

  2000 Jan 1 - 2000 Dec 31

  Reference

  PRO 57/15769

• Catalogue level

  Item

  Appendix 4A Paris - see HW 15/38 for message texts

  Appendix 4A Paris - see HW 15/38 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/9

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  DIPLOMATIC, COMMERCIAL AND METEOROLOGICAL COMMUNICATIONS: Japanese Section summary reports from intercepted Japanese and Siamese diplomatic communications HW 10, HW 38

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Series

  Government Code and Cypher School: Diplomatic Section: Reports to British Agencies...

  This series consists of reports of Japanese diplomatic intercepts concerning subversion of potential interest to British security agencies.The reports contain information significant in the conduct of the Second World War.

  Held by

  The National Archives, Kew

  Date

  1943

  Reference

  HW 38

• Catalogue level

  Piece

  GC&CS Naval Cryptanalytic Studies Volume XIII: The Japanese Merchant/Navy Liaison...

  GC&CS Naval Cryptanalytic Studies Volume XIII: The Japanese Merchant/Navy Liaison Cyphers by H L John and G C Wall

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/38

• Catalogue level

  Piece

  DSH 15 - Cryptographic Reports. Technical crypt reports. The section was at Elmers...

  DSH 15 - Cryptographic Reports. Technical crypt reports. The section was at Elmers School, Bletchley initially and moved in January 1943 to Alford House (Commercial) and Berkeley Street (Diplomatic) in London

  Held by

  The National Archives, Kew

  Date

  1940 Jan 01 - 1943 Apr 02

  Reference

  HW 53/38

• Catalogue level

  Piece

  Synopsis on 'Y' [Sigint] at Sea (European Naval). Notes on the establishment of sea-going...

  Synopsis on 'Y' [Sigint] at Sea (European Naval). Notes on the establishment of sea-going linguist radio operators for the interception of German VHF radio telephony

  Held by

  The National Archives, Kew

  Date

  1941 Apr 04 - 1942 Jul 22

  Reference

  HW 50/38

• Catalogue level

  Piece

  Reports and correspondence relating to enemy exploitation of communications associated...

  Reports and correspondence relating to enemy exploitation of communications associated with Russian convoys

  Held by

  The National Archives, Kew

  Date

  1944 Dec 05 - 1945 Mar 27

  Reference

  HW 40/38

• Catalogue level

  Piece

  Romanian Police reports on political, security and economic matters including worker...

  Romanian Police reports on political, security and economic matters including worker discontent and activity by minority groups

  Held by

  The National Archives, Kew

  Date

  1947 Jan 13 - 1947 Feb 07

  Reference

  HW 75/38

• Catalogue level

  Piece

  Decrypts of intercepted diplomatic communications. Afghanistan: 10963. France: 10953-10954,...

  Decrypts of intercepted diplomatic communications. Afghanistan: 10963. France: 10953-10954, 10978, 10986, 10999, 11007-11008, 11016-11017, 11035, 11045-11046, 11053-11054, 11067, 11074, 11081, 11094, 11105-11107, 11137, 11146, 11150, 11167, 11171-111…

  Held by

  The National Archives, Kew

  Date

  1922 Sept

  Reference

  HW 12/38

• Catalogue level

  Piece

  ALAN TURING WARTIME RESEARCH PAPERS RELEASED BY GCHQ'Paper on Statistics of Repetitions'...

  ALAN TURING WARTIME RESEARCH PAPERS RELEASED BY GCHQ'Paper on Statistics of Repetitions' As the country marks the centenary of Alan Turing's birth, two of his mathematical research papers, believed to have been written whilst he was at Bletchley Park…

  Held by

  The National Archives, Kew

  Date

  1945 Jan 01 - 1946 Dec 31

  Reference

  HW 25/38

• Catalogue level

  Piece

  Information on the communications of the German, Spanish, Italian and French navies

  Information on the communications of the German, Spanish, Italian and French navies

  Held by

  The National Archives, Kew

  Date

  1942 Jul 15-1944 Apr 16

  Reference

  HW 18/38

• Catalogue level

  Piece

  Reports of decrypts of Japanese military attachés messages

  Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1944 May 16-1944 May 22

  Reference

  HW 35/38

• Catalogue level

  Piece

  Outgoing reports policy

  Outgoing reports policy

  Held by

  The National Archives, Kew

  Date

  1941 Dec 12-1945 Apr 12

  Reference

  HW 2/38

• Catalogue level

  Piece

  Reports of Japanese army air decrypts

  Reports of Japanese army air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 Jan 08-1945 Jul 18

  Reference

  HW 28/38

• Catalogue level

  Piece

  Reports of Japanese naval air decrypts

  Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 May 07-1945 Jun 30

  Reference

  HW 27/38

• Catalogue level

  Piece

  Weekly summary reports on Second World War German army and air force communications

  Weekly summary reports on Second World War German army and air force communications

  Held by

  The National Archives, Kew

  Date

  1944 Aug 12-1944 Sep 02

  Reference

  HW 45/38

• Catalogue level

  Piece

  38732-40440

  38732-40440

  Held by

  The National Archives, Kew

  Date

  1942 Sep 16-1942 Sep 30

  Reference

  HW 19/38

• Catalogue level

  Piece

  German Naval Air Activity (GNA): Including reconnaissance and offensive operations

  German Naval Air Activity (GNA): Including reconnaissance and offensive operations

  Held by

  The National Archives, Kew

  Date

  1944 Jan 1-1944 Mar 31

  Reference

  HW 13/38

• Catalogue level

  Piece

  GAF strength in northern Norway on Aug 24. Italian minister, Lisbon reports meeting...

  GAF strength in northern Norway on Aug 24. Italian minister, Lisbon reports meeting with Portuguese official discussing Portuguese neutrality. Italian minister, Tehran reports interview with Iranian Foreign Minister regarding British-Soviet memoranda…

  Held by

  The National Archives, Kew

  Date

  1941 Sept 1

  Reference

  HW 1/38