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• Catalogue level

  Piece

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

  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

• Catalogue level

  Piece

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

  Sheet Number HW 73 SE and 83 SW parts of, inset of 62 NW and 63 SW on Ordnance Survey (OS) based mapping dated 1973

  Held by

  The National Archives, Kew

  Date

  1975 May 16 - 1998 Dec 21

  Reference

  OS 42/21098

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  -c73">HW 73.

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Series

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

  This series contains GC&CS studies undertaken into the German Central Cryptographic Organisation (OKW/CHI) operations against British cyphers before and during the Second World War.

  Held by

  The National Archives, Kew

  Date

  1934-1945

  Reference

  HW 73

• Catalogue level

  Piece

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

  Japanese Naval Cyphers and Ransuuban. Historical notes on the introduction by the Japanese Navy of a new regionally allocated strip key cypher (Ransuuban)

  Held by

  The National Archives, Kew

  Date

  1944 Nov 01 - 1945 Aug 05

  Reference

  HW 50/73

• Catalogue level

  Piece

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

  German Y Organisation Personnel and Success Vol I. This appears to be a file maintained at a North African HQ on German Sigint in the Western Desert

  Held by

  The National Archives, Kew

  Date

  1938 Oct 20 - 1943 Dec 24

  Reference

  HW 73/6

• Catalogue level

  Piece

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

  GC&CS Naval Section and OIC (Operational Intelligence Centre), Admiralty, Special Intelligence Summaries on German 'Y' 4 July 1941-December 1943. Reports on German Sigint reporting, mainly naval, derived mostly from study of decrypts of German me…

  Held by

  The National Archives, Kew

  Date

  1941 Jul 04 - 1943 Dec 29

  Reference

  HW 73/2

• Catalogue level

  Piece

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

  Germany 'Y' Organisation Listening Posts. Translation of a German manual. 'Scarlet Pimpernel' suggests that the document was acquired by the French

  Held by

  The National Archives, Kew

  Date

  1934 Jan 01 - 1935 Dec 31

  Reference

  HW 73/7

• Catalogue level

  Piece

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

  Signals containing results of interrogations by counter intelligence officers of suspected enemy collaborateurs and agents

  Held by

  The National Archives, Kew

  Date

  1944 Dec 22-1945 Mar 01

  Reference

  HW 41/73

• Catalogue level

  Piece

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

  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

• Catalogue level

  Piece

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

  EWT to C on release of Ultra to MEW, to go via Berkeley St or SIS Apr 16; several versions of paper from Gp Capt Winterbotham at HQ to EWT and SIS on organisation and duties of SLUs Apr 13-16; Welchman to EWT on case for retaining experienced officer…

  Held by

  The National Archives, Kew

  Date

  1943 Apr 11-20

  Reference

  HW 14/73

• Catalogue level

  Piece

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

  The German Central Cryptographic Organisation (account based on Abwehr and SD sources). Notes on the German Y Services. OKM 4 SKL III (Abteilung Funkaufklaerung). Japanese Military Attache Reports on Allied Units in Great Britain. Brief Order of Batt…

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 May 08

  Reference

  HW 73/5

• Catalogue level

  Piece

  Navy CHECKMATE. Missing at transfer

  Navy CHECKMATE. Missing at transfer

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01 - 1943 Dec 31

  Reference

  HW 40/73

• Catalogue level

  Piece

  Domestic

  Domestic

  Held by

  Creating government department or its successor

  Date

  1943

  Reference

  HW 3/73

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1941 Jan 09-1941 Jan 15

  Reference

  HW 29/73

• Catalogue level

  Piece

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

  Comintern messages: Communist Party of Great Britain, LONDON, and KOMINTERNPARTI STOCKHOLM; CE2 PARIS-LONDON

  Held by

  The National Archives, Kew

  Date

  1933 Mar 17-1933 June 9

  Reference

  HW 17/73

• Catalogue level

  Piece

  Eastern Mediterranean Summaries 1 - 45.

  Eastern Mediterranean Summaries 1 - 45.

  Held by

  The National Archives, Kew

  Date

  1943 Aug 1-1943 Aug 20

  Reference

  HW 21/73

• Catalogue level

  Piece

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

  Bulgarian State Security and National Militia messages including illegal frontier crossings. Also includes small number of Bulgarian Frontier Guards reports

  Held by

  The National Archives, Kew

  Date

  1949 Jul 14 - 1950 Dec 04

  Reference

  HW 75/73

• Catalogue level

  Piece

  Decrypts of Japanese army and army air force messages

  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

• Catalogue level

  Piece

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

  Enemy Cryptography on High Grade British Codes and Cyphers from January 1944 to end of War. Detailed records on suspected German cryptographic successes

  Held by

  The National Archives, Kew

  Date

  1943 May 24 - 1945 Feb 21

  Reference

  HW 73/3