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• Accessions administration: HW 18

  Held by

  The National Archives, Kew

  Date

  2000 Jan 1 - 2003 Dec 31

  Reference

  PRO 57/15751

• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Naval Section: Reports of German, Italian, French,...

  Held by

  Date

  1938-1945

  Reference

  HW 18

• Deciphered high grade German naval messages NOTE: see also DEFE 3/531-551

  Held by

  The National Archives, Kew

  Date

  1945 Jan 30-1945 Mar 23

  Reference

  HW 18/18

• New York: Unidentified statistics relating to European towns - reported to "VIKTOR"...

  Held by

  The National Archives, Kew

  Date

  1943 May 21

  Reference

  HW 15/18/18

• False starts by U-boats from Biscay ports

  Held by

  The National Archives, Kew

  Date

  1943 May 01-1943 Aug 31

  Reference

  HW 18/196

• Portuguese naval messages

  Held by

  The National Archives, Kew

  Date

  1943 Nov 20-1944 Jan 17

  Reference

  HW 18/166

• Communications between German military attacheTokyo and Berlin

  Held by

  The National Archives, Kew

  Date

  1944 Mar 07-1945 Apr 10

  Reference

  HW 18/34

• Decrypts of medium/low grade German naval cypher messages

  Held by

  The National Archives, Kew

  Date

  1941 Jun 20-1942 Feb 04

  Reference

  HW 18/64

• Technical intelligence reports 1-25: Series of reports concerned with German naval...

  Held by

  The National Archives, Kew

  Date

  1943 Aug 18-1944 Sep 25

  Reference

  HW 18/165

• French naval messages

  Held by

  The National Archives, Kew

  Date

  1940 Oct 12-1940 Oct 22

  Reference

  HW 18/139

• Naval Section technical papers

  Held by

  The National Archives, Kew

  Date

  1943 Oct 15-1945 Jul 26

  Reference

  HW 18/227

• French naval messages

  Held by

  The National Archives, Kew

  Date

  1941 Feb 05-1941 Feb 13

  Reference

  HW 18/119

• German naval air reports

  Held by

  The National Archives, Kew

  Date

  1942 Jun 30-1943 Jan 01

  Reference

  HW 18/101

• German naval activity

  Held by

  The National Archives, Kew

  Date

  1941 Jun 17-1941 Nov 04

  Reference

  HW 18/12

• French naval messages

  Held by

  The National Archives, Kew

  Date

  1940 Aug 13-1940 Aug 26

  Reference

  HW 18/134

• Handbook on Italian service signals organisation (7parts) Covers navy,army and air...

  Held by

  The National Archives, Kew

  Date

  1943 May 01-1943 May 01

  Reference

  HW 18/109

• U-Boat methods of combined attack on convoys (ZIP/ZG/116)

  Held by

  The National Archives, Kew

  Date

  1941 Feb 01-1941 Oct 31

  Reference

  HW 18/6

• French naval messages

  Held by

  The National Archives, Kew

  Date

  1940 Aug 01-1940 Aug 13

  Reference

  HW 18/133

• Naval Headlines

  Held by

  The National Archives, Kew

  Date

  1941 Jun 21-1941 Dec 31

  Reference

  HW 18/92