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• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Cypher Messages of Allies

  Held by

  The National Archives, Kew

  Date

  1942-1945

  Reference

  HW 74

• SS Reports February 1944. Free French, Belgian, Brazilian, Dutch and Polish

  Held by

  The National Archives, Kew

  Date

  1944 Jan 25 - 1944 Feb 29

  Reference

  HW 74/4

• SS Reports January 1944. Free-French, Netherlands Intelligence Department, London,...

  Held by

  The National Archives, Kew

  Date

  1943 Dec 23 - 1944 Jan 31

  Reference

  HW 74/3

• SS Reports March 1944. Free French, Belgian, Dutch and Polish

  Held by

  The National Archives, Kew

  Date

  1944 Feb 18 - 1944 Mar 31

  Reference

  HW 74/5

• SS Reports October-November-December 1944. Free French, Belgian, Czechoslovakian...

  Held by

  The National Archives, Kew

  Date

  1944 Sep 27 - 1944 Dec 31

  Reference

  HW 74/11

• Signals containing results of interrogations by counter intelligence officers of...

  Held by

  The National Archives, Kew

  Date

  1944 Dec 28-1945 May 14

  Reference

  HW 41/74

• Frequencies of German and Italian communications

  Held by

  The National Archives, Kew

  Date

  1942 Oct 12 - 1942 Nov 01

  Reference

  HW 51/74

• Decrypts of intercepted diplomatic communications. Belgium: 21297. Brazil: 21453....

  Held by

  The National Archives, Kew

  Date

  1925 Sept

  Reference

  HW 12/74

• SS Reports August 1944. Free French, Belgian and Polish

  Held by

  The National Archives, Kew

  Date

  1944 Jul 15 - 1944 Aug 31

  Reference

  HW 74/9

• SS Reports April 1944. Free French and Polish

  Held by

  The National Archives, Kew

  Date

  1944 Mar 27 - 1944 Apr 30

  Reference

  HW 74/6

• Enemy exploitation of codes and cyphers used by UK Civil Departments: general; miscellaneous...

  Held by

  The National Archives, Kew

  Date

  1942 Oct 05 - 1946 May 06

  Reference

  HW 40/74

• Comintern messages: Communist Party of Great Britain, LONDON, KOMINTERNPARTI STOCKHOLM...

  Held by

  The National Archives, Kew

  Date

  1933 June 12-1933 Oct 10

  Reference

  HW 17/74

• Italian air summaries: general correspondence with Cairo.

  Held by

  The National Archives, Kew

  Date

  1942 Feb 20-1942 Nov 14

  Reference

  HW 21/74

• Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1944 Dec 25-1944 Dec 30

  Reference

  HW 35/74

• Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1945 Jun 10-1945 Sep 06

  Reference

  HW 52/74

• Reports of Japanese army air decrypts with subject headers

  Held by

  The National Archives, Kew

  Date

  1945 Mar 07-1945 Jul 11

  Reference

  HW 28/74

• 86095-86815

  Held by

  The National Archives, Kew

  Date

  1944 Sep 21-1944 Oct 03

  Reference

  HW 19/74

• Operational orders of 2nd Air Corps south of Smolensk: two groups at hour's readiness...

  Held by

  The National Archives, Kew

  Date

  1941 Sept 18

  Reference

  HW 1/74

• Decrypts of medium/low grade German naval cypher messages

  Held by

  The National Archives, Kew

  Date

  1943 Apr 29-1943 May 24

  Reference

  HW 18/74