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• Commercial messages passed over diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1944 Apr 01-1944 Apr 30

  Reference

  HW 32/26

• Hungarian Police and Border Guards messages including political meetings and movement...

  Held by

  The National Archives, Kew

  Date

  1947 Jul 03 - 1950 Sep 22

  Reference

  HW 75/26

• Croatian naval decrypts

  Held by

  The National Archives, Kew

  Date

  1944 Mar 17-1945 Jan 30

  Reference

  HW 26/3

• Croatian military decrypts and Croatian army order of battle

  Held by

  The National Archives, Kew

  Date

  1944 Feb 20-1945 May 11

  Reference

  HW 26/1

• Reports of Japanese army air decrypts

  Held by

  The National Archives, Kew

  Date

  1944 May 28-1944 Dec 05

  Reference

  HW 28/26

• Croatian military communications

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01-1944 Jan 31

  Reference

  HW 26/2

• 22589-23882

  Held by

  The National Archives, Kew

  Date

  1942 Mar 16-1942 Mar 31

  Reference

  HW 19/26

• Intelligence assessments of GAF operations and reactions, including activities of...

  Held by

  The National Archives, Kew

  Date

  1942 Apr 5-1944 Jan 12

  Reference

  HW 13/26

• Decrypts of Comintern messages: Moscow, USSR, with Spain. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1933 Dec-1936 June

  Reference

  HW 17/26

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

  Held by

  The National Archives, Kew

  Date

  1944 Jun 01-1944 Jun 22

  Reference

  HW 45/26

• Development of co-operation on signals intelligence with Russia

  Held by

  The National Archives, Kew

  Date

  1941 Dec 19 - 1943 Sep 02

  Reference

  HW 61/26

• Cypher Policy Board (CPB): Speech Secrecy Panel (SSP) minutes of meetings.

  Held by

  The National Archives, Kew

  Date

  1954 Feb-1954 June

  Reference

  HW 9/26

• GC&CS Naval Cryptanalytic Studies Volume I: Introduction and Scoring Techniques by...

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/26

• Co-operation with USA

  Held by

  The National Archives, Kew

  Date

  1942 May 02 - 1946 Feb 01

  Reference

  HW 57/26

• Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Apr 17-1940 Apr 23

  Reference

  HW 29/26

• Exploitation of Russian Military communications by Axis Powers

  Held by

  The National Archives, Kew

  Date

  1942 Aug 13 - 1946 Jan 29

  Reference

  HW 40/26

• Croatian military messages

  Held by

  The National Archives, Kew

  Date

  1944 Feb 19 - 1944 Jun 07

  Reference

  HW 26/4

• Miscellaneous signals to and from CBME

  Held by

  The National Archives, Kew

  Date

  1942 May 01 - 1944 Apr 30

  Reference

  HW 51/26

• Miscellaneous photographs of ENIGMA, TUNNY and COLOSSUS

  Held by

  The National Archives, Kew

  Date

  Reference

  HW 25/26

• Italian Mission - Mr Catty and Mr Duke's reports. Reports by the Cypher Security...

  Held by

  The National Archives, Kew

  Date

  1944 Oct 06 - 1945 Jan 05

  Reference

  HW 53/26