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• Catalogue level

  Piece

  Accessions administration: HW 37

  Accessions administration: HW 37

  Held by

  The National Archives, Kew

  Date

  2000 Jan 1 - 2000 Dec 31

  Reference

  PRO 57/15768

• Catalogue level

  Item

  Appendix 4B Prague - see HW 15/37 for message texts

  Appendix 4B Prague - see HW 15/37 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/10

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  ; Diplomatic intercept decrypts HW 12, HW 37; Commercial Section HW 29; Japanese Commercial

  Held by
  Date
  1914-1979
  Reference

• Catalogue level

  Series

  Government Code and Cypher School: Diplomatic Section: Diplomatic Decrypts Passed...

  The records in this series consist of a number of decrypts of diplomatic wireless traffic passed to the Director General of the Secret Intelligence Service for distribution. The records appear to be the RES (Reserved) series of BJ decrypts or, alter…

  Held by

  The National Archives, Kew

  Date

  1935-1945

  Reference

  HW 37

• Catalogue level

  Piece

  GC&CS Naval Cryptanalytic Studies Volume XII: Japanese Machine Cyphers by R A Carter...

  GC&CS Naval Cryptanalytic Studies Volume XII: Japanese Machine Cyphers by R A Carter and A L Yoxall

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/37

• Catalogue level

  Piece

  Appointment and terms of reference for Lieutenant Colonel Crankshaw, representative...

  Appointment and terms of reference for Lieutenant Colonel Crankshaw, representative of the Y services in Russia attached to No. 30 Mission Moscow

  Held by

  The National Archives, Kew

  Date

  1942 Jul 14 - 1942 Jul 29

  Reference

  HW 61/37

• Catalogue level

  Piece

  Decrypts of intercepted diplomatic communications. Afghanistan: 10757, 10795-10796,...

  Decrypts of intercepted diplomatic communications. Afghanistan: 10757, 10795-10796, 10860, 10876, 10899. Brazil: 10914. France: 10743, 10754, 10839, 10879, 10885, 10917, 10942. Greece: 10740, 10749, 10766-10767, 10772-10773, 10825-10827, 10837-10838,…

  Held by

  The National Archives, Kew

  Date

  1922 Aug

  Reference

  HW 12/37

• Catalogue level

  Piece

  ALAN TURING WARTIME RESEARCH PAPERS RELEASED BY GCHQ'The Applications of Probability...

  ALAN TURING WARTIME RESEARCH PAPERS RELEASED BY GCHQ'The Applications of Probability to Crypt'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…

  Held by

  The National Archives, Kew

  Date

  1945 Jan 01 - 1946 Dec 31

  Reference

  HW 25/37

• Catalogue level

  Piece

  Security

  Security

  Held by

  The National Archives, Kew

  Date

  1940 Mar 16 - 1942 Dec 18

  Reference

  HW 64/37

• Catalogue level

  Piece

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

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

  Held by

  The National Archives, Kew

  Date

  1940 Aug 14-1942 Jul 11

  Reference

  HW 18/37

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Jul 23-1940 Jul 31

  Reference

  HW 29/37

• Catalogue level

  Piece

  Diplomatic messages submitted to Director ["C", Head of MI6], January 1944-August...

  Diplomatic messages submitted to Director ["C", Head of MI6], January 1944-August 1945

  Held by

  The National Archives, Kew

  Date

  1944 Jan 24-1945 Aug 27

  Reference

  HW 37/3

• Catalogue level

  Piece

  Messages submitted to "D" [ probably Director MI6, "C"] 1935-1941.

  Messages submitted to "D" [ probably Director MI6, "C"] 1935-1941.

  Held by

  The National Archives, Kew

  Date

  1935 Jan 03-1941 Mar 07

  Reference

  HW 37/1

• Catalogue level

  Piece

  Vol. XXIV The German Navy and Japan by Lieutenant Commander K W McMahan, USNR; edited...

  Vol. XXIV The German Navy and Japan by Lieutenant Commander K W McMahan, USNR; edited by Lieutenant Commander L A Griffiths, RNVR

  Held by

  The National Archives, Kew

  Date

  1941 - 1945

  Reference

  HW 11/37

• Catalogue level

  Piece

  RAF Middle East summaries describing enemy operational activity, transport movements...

  RAF Middle East summaries describing enemy operational activity, transport movements and fuel supply on all fronts

  Held by

  The National Archives, Kew

  Date

  1942 Nov 06-1942 Dec 31

  Reference

  HW 41/37

• 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 12-1944 May 17

  Reference

  HW 35/37

• Catalogue level

  Piece

  Kingsdown Broadcast policy

  Kingsdown Broadcast policy

  Held by

  The National Archives, Kew

  Date

  1944 May 15-1945 Jan 23

  Reference

  HW 2/37

• Catalogue level

  Piece

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

  Romanian Police reports on political, security and economic matters including the election results

  Held by

  The National Archives, Kew

  Date

  1946 Dec 07 - 1947 Jan 10

  Reference

  HW 75/37

• Catalogue level

  Piece

  Reports of Japanese naval air decrypts

  Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 Apr 25-1945 Jun 18

  Reference

  HW 27/37

• 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 Jul 15-1944 Aug 12

  Reference

  HW 45/37