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• Catalogue level

  Piece

  Commercial messages passed over diplomatic channels

  Commercial messages passed over diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1944 Apr 01-1944 Apr 30

  Reference

  HW 32/26

• Catalogue level

  Piece

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

  Hungarian Police and Border Guards messages including political meetings and movement of foreigners

  Held by

  The National Archives, Kew

  Date

  1947 Jul 03 - 1950 Sep 22

  Reference

  HW 75/26

• Catalogue level

  Piece

  Croatian naval decrypts

  Croatian naval decrypts

  Held by

  The National Archives, Kew

  Date

  1944 Mar 17-1945 Jan 30

  Reference

  HW 26/3

• Catalogue level

  Piece

  Croatian military decrypts and Croatian army order of battle

  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

• Catalogue level

  Piece

  Reports of Japanese army air decrypts

  Reports of Japanese army air decrypts

  Held by

  The National Archives, Kew

  Date

  1944 May 28-1944 Dec 05

  Reference

  HW 28/26

• Catalogue level

  Piece

  Croatian military communications

  Croatian military communications

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01-1944 Jan 31

  Reference

  HW 26/2

• Catalogue level

  Piece

  22589-23882

  22589-23882

  Held by

  The National Archives, Kew

  Date

  1942 Mar 16-1942 Mar 31

  Reference

  HW 19/26

• Catalogue level

  Piece

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

  Intelligence assessments of GAF operations and reactions, including activities of experimental bomber units; reactions to Malta convoys; use of BENITO system; attacks on shipping in Portuguese waters resulting from Abwehr information; summary of BV 2…

  Held by

  The National Archives, Kew

  Date

  1942 Apr 5-1944 Jan 12

  Reference

  HW 13/26

• Catalogue level

  Piece

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

  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

• Catalogue level

  Piece

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

  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

• Catalogue level

  Piece

  Development of co-operation on signals intelligence with Russia

  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

• Catalogue level

  Piece

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

  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

• Catalogue level

  Piece

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

  GC&CS Naval Cryptanalytic Studies Volume I: Introduction and Scoring Techniques by C H O'D Alexander, J W S Cassels, H R Foss, P Hall and A S C Ross

  Held by

  Creating government department or its successor

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/26

• Catalogue level

  Piece

  Co-operation with USA

  Co-operation with USA

  Held by

  The National Archives, Kew

  Date

  1942 May 02 - 1946 Feb 01

  Reference

  HW 57/26

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Apr 17-1940 Apr 23

  Reference

  HW 29/26

• Catalogue level

  Piece

  Exploitation of Russian Military communications by Axis Powers

  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

• Catalogue level

  Piece

  Croatian military messages

  Croatian military messages

  Held by

  The National Archives, Kew

  Date

  1944 Feb 19 - 1944 Jun 07

  Reference

  HW 26/4

• Catalogue level

  Piece

  Miscellaneous signals to and from CBME

  Miscellaneous signals to and from CBME

  Held by

  The National Archives, Kew

  Date

  1942 May 01 - 1944 Apr 30

  Reference

  HW 51/26

• Catalogue level

  Piece

  Miscellaneous photographs of ENIGMA, TUNNY and COLOSSUS

  Miscellaneous photographs of ENIGMA, TUNNY and COLOSSUS

  Held by

  The National Archives, Kew

  Date

  Reference

  HW 25/26

• Catalogue level

  Piece

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

  Italian Mission - Mr Catty and Mr Duke's reports. Reports by the Cypher Security Mission in Rome responsible for overseeing Italian diplomatic cypher usage

  Held by

  The National Archives, Kew

  Date

  1944 Oct 06 - 1945 Jan 05

  Reference

  HW 53/26