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• Catalogue level

  Piece

  Spanish naval activity

  Spanish naval activity

  Held by

  The National Archives, Kew

  Date

  1941 Feb 12-1944 Oct 07

  Reference

  HW 22/23

• 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 Mar 09-1944 Mar 15

  Reference

  HW 35/23

• Catalogue level

  Piece

  Commercial messages sent in private company codes

  Commercial messages sent in private company codes

  Held by

  The National Archives, Kew

  Date

  1945 Apr 01-1945 Apr 30

  Reference

  HW 31/23

• Catalogue level

  Piece

  Liaison between CBME and GC&CS on cryptanalysis of Italian air force cyphers

  Liaison between CBME and GC&CS on cryptanalysis of Italian air force cyphers

  Held by

  The National Archives, Kew

  Date

  1941 Nov 25 - 1943 Dec 15

  Reference

  HW 51/23

• Catalogue level

  Piece

  The COLOSSUS by B Randell, published in June 1976: an attempt to document the story...

  The COLOSSUS by B Randell, published in June 1976: an attempt to document the story of the development of COLOSSUS and the people involved

  Held by

  The National Archives, Kew

  Date

  1941 Feb 01 - 1945 Dec 31

  Reference

  HW 25/23

• 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 Feb 18-1944 Mar 23

  Reference

  HW 45/23

• Catalogue level

  Piece

  Dossier on EXOTICS (covername for W/T traffic from all countries other than Germany...

  Dossier on EXOTICS (covername for W/T traffic from all countries other than Germany and Japan). Post-war planning

  Held by

  Creating government department or its successor

  Date

  1944 Aug 03 - 1945 Sep 20

  Reference

  HW 50/23

• Catalogue level

  Piece

  German exploitation of Russian Army communications. Prisoner of war reports

  German exploitation of Russian Army communications. Prisoner of war reports

  Held by

  Creating government department or its successor

  Date

  1946 Nov 25 - 1946 Dec 20

  Reference

  HW 40/23

• Catalogue level

  Piece

  Intelligence summaries issued by the Air Ministry on the war situation compiled from...

  Intelligence summaries issued by the Air Ministry on the war situation compiled from SIS (MI6) and Bletchley Park reports

  Held by

  The National Archives, Kew

  Date

  1942 Jul 22-1944 Dec 14

  Reference

  HW 41/23

• Catalogue level

  Piece

  Reports based on Japanese naval decrypts

  Reports based on Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1944 Jun 16-1945 Feb 23

  Reference

  HW 23/667

• Catalogue level

  Piece

  Reports based on Japanese naval decrypts

  Reports based on Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1945 Feb 24-1945 May 24

  Reference

  HW 23/668

• Catalogue level

  Piece

  Intelligence reports on the Japanese navy

  Intelligence reports on the Japanese navy

  Held by

  The National Archives, Kew

  Date

  1944 Jul 14-1945 Jun 23

  Reference

  HW 23/783

• Catalogue level

  Piece

  Reports of Japanese naval decrypts sent to the Admiralty and the British naval fleet...

  Reports of Japanese naval decrypts sent to the Admiralty and the British naval fleet in Colombo

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01-1944 Jun 12

  Reference

  HW 23/666

• Catalogue level

  Piece

  Reports of Japanese naval decrypts sent to the Admiralty and the British fleets in...

  Reports of Japanese naval decrypts sent to the Admiralty and the British fleets in Kalindini and Colombo

  Held by

  The National Archives, Kew

  Date

  1942 Nov 11-1943 Dec 31

  Reference

  HW 23/665

• Catalogue level

  Piece

  Far Eastern shipping reports

  Far Eastern shipping reports

  Held by

  The National Archives, Kew

  Date

  1944 Feb 27-1944 Jul 29

  Reference

  HW 23/807

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1942 Mar 05-1942 Sep 30

  Reference

  HW 23/1

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Apr 01-1943 Apr 15

  Reference

  HW 23/15

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Feb 14-1943 Feb 28

  Reference

  HW 23/12

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Sep 08-1943 Sep 15

  Reference

  HW 23/32

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Nov 21-1943 Nov 23

  Reference

  HW 23/49