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• Sheet Number Parts HW 73 SE and HW 83 SW inset HW 62 NW and HW 63 SW

  Held by

  The National Archives, Kew

  Date

  1973

  Reference

  OS 42/117

• Sheet Number HW 73 SE and 83 SW parts of, inset of 62 NW and 63 SW on Ordnance Survey...

  Held by

  The National Archives, Kew

  Date

  1975 May 16 - 1998 Dec 21

  Reference

  OS 42/21098

• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: German Signals Intelligence in the Second World...

  Held by

  The National Archives, Kew

  Date

  1934-1945

  Reference

  HW 73

• Japanese Naval Cyphers and Ransuuban. Historical notes on the introduction by the...

  Held by

  The National Archives, Kew

  Date

  1944 Nov 01 - 1945 Aug 05

  Reference

  HW 50/73

• German Y Organisation Personnel and Success Vol I. This appears to be a file maintained...

  Held by

  The National Archives, Kew

  Date

  1938 Oct 20 - 1943 Dec 24

  Reference

  HW 73/6

• GC&CS Naval Section and OIC (Operational Intelligence Centre), Admiralty, Special...

  Held by

  The National Archives, Kew

  Date

  1941 Jul 04 - 1943 Dec 29

  Reference

  HW 73/2

• Germany 'Y' Organisation Listening Posts. Translation of a German manual. 'Scarlet...

  Held by

  The National Archives, Kew

  Date

  1934 Jan 01 - 1935 Dec 31

  Reference

  HW 73/7

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

  Held by

  The National Archives, Kew

  Date

  1944 Dec 22-1945 Mar 01

  Reference

  HW 41/73

• Reports in the series VM/3751 to VM/4000.

  Held by

  The National Archives

  Date

  1943 Feb 11-1943 Feb 14

  Reference

  HW 20/73

• EWT to C on release of Ultra to MEW, to go via Berkeley St or SIS Apr 16; several...

  Held by

  The National Archives, Kew

  Date

  1943 Apr 11-20

  Reference

  HW 14/73

• The German Central Cryptographic Organisation (account based on Abwehr and SD sources)....

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 May 08

  Reference

  HW 73/5

• Navy CHECKMATE. Missing at transfer

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01 - 1943 Dec 31

  Reference

  HW 40/73

• Domestic

  Held by

  Creating government department or its successor

  Date

  1943

  Reference

  HW 3/73

• Commercial reports

  Held by

  The National Archives, Kew

  Date

  1941 Jan 09-1941 Jan 15

  Reference

  HW 29/73

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

  Held by

  The National Archives, Kew

  Date

  1933 Mar 17-1933 June 9

  Reference

  HW 17/73

• Eastern Mediterranean Summaries 1 - 45.

  Held by

  The National Archives, Kew

  Date

  1943 Aug 1-1943 Aug 20

  Reference

  HW 21/73

• Bulgarian State Security and National Militia messages including illegal frontier...

  Held by

  The National Archives, Kew

  Date

  1949 Jul 14 - 1950 Dec 04

  Reference

  HW 75/73

• Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1945 Jun 10-1945 Aug 16

  Reference

  HW 52/73

• Enemy Cryptography on High Grade British Codes and Cyphers from January 1944 to end...

  Held by

  The National Archives, Kew

  Date

  1943 May 24 - 1945 Feb 21

  Reference

  HW 73/3