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  Piece

  Decrypts of intercepted diplomatic communications. Argentina: 1238-1239, 1490. Chile:...

  Decrypts of intercepted diplomatic communications. Argentina: 1238-1239, 1490. Chile: 1212, 1228, 1292, 1398, 1442. Denmark: 1269-1270, 1295-1296, 1315, 1334-1335, 1419, 1437. Germany: 1229-1230, 1271-1272, 1316-1317, 1377-1379, 1399, 1421-1422. Gree…

  Held by

  The National Archives, Kew

  Date

  1920 Feb 11-1920 Mar 5

  Reference

  HW 12/5

• Catalogue level

  Piece

  Minutes of monthly cypher production meetings held by L Department (the Cypher Security...

  Minutes of monthly cypher production meetings held by L Department (the Cypher Security Group)

  Held by

  The National Archives, Kew

  Date

  1954 Dec-1960 Jan

  Reference

  HW 9/5

• Catalogue level

  Piece

  Bletchley Park Records. Correspondence concerning the location and retention or destruction...

  Bletchley Park Records. Correspondence concerning the location and retention or destruction of GC&CS World War II historical records

  Held by

  The National Archives, Kew

  Date

  1945 Aug 20 - 1950 Jul 07

  Reference

  HW 50/5

• Catalogue level

  Piece

  Staffing matters including recruitment, deployment and conditions of service

  Staffing matters including recruitment, deployment and conditions of service

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Jun 30

  Reference

  HW 72/5

• Catalogue level

  Piece

  Messages concerning the development of communications to relay intercepted enemy...

  Messages concerning the development of communications to relay intercepted enemy signals

  Held by

  The National Archives, Kew

  Date

  1941 Nov 26 - 1943 Jun 29

  Reference

  HW 59/5

• 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

  Movement of Croatian officer

  Movement of Croatian officer

  Held by

  The National Archives, Kew

  Date

  1944 Dec 01

  Reference

  HW 26/5

• Catalogue level

  Piece

  Japanese communcations: messages and reports concerned with intercept, analysis and...

  Japanese communcations: messages and reports concerned with intercept, analysis and code breaking

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01 - 1943 Sep 30

  Reference

  HW 67/5

• Catalogue level

  Piece

  GAF safety service organisation; general survey of Zenit (meteorology) traffic; computer...

  GAF safety service organisation; general survey of Zenit (meteorology) traffic; computer personnel on service with the RN; footprinting; interception, jamming and intelligence reporting of GAF raid reporting traffic; GAF navigational aids

  Held by

  The National Archives, Kew

  Date

  1939-1945

  Reference

  HW 2/5

• Catalogue level

  Piece

  Signals concerned with the interception of Middle East and North African communications

  Signals concerned with the interception of Middle East and North African communications

  Held by

  The National Archives, Kew

  Date

  1944 May 01 - 1944 Sep 30

  Reference

  HW 68/5

• Catalogue level

  Piece

  Including order to Wehrmacht from Keitel calling for unconditional obedience to new...

  Including order to Wehrmacht from Keitel calling for unconditional obedience to new Head of State; various attestations of loyalty to Dönitz

  Held by

  The National Archives, Kew

  Date

  May 5 1945-May 6 1945

  Reference

  HW 5/702

• Catalogue level

  Piece

  Further decrypts relating to the development of the V weapons

  Further decrypts relating to the development of the V weapons

  Held by

  The National Archives, Kew

  Date

  1944 Feb 22- May 26

  Reference

  HW 5/709

• Catalogue level

  Piece

  Reports of traffic taken on German Army teleprinter links

  Reports of traffic taken on German Army teleprinter links

  Held by

  The National Archives, Kew

  Date

  1944 Aug- 1945 Feb 20

  Reference

  HW 5/738

• Catalogue level

  Piece

  Volume 2 of "BROWN " reports

  Volume 2 of "BROWN " reports

  Held by

  The National Archives, Kew

  Date

  1941 Mar 25- 1943 June 4

  Reference

  HW 5/720

• Catalogue level

  Piece

  Unreported documents

  Unreported documents

  Held by

  The National Archives, Kew

  Date

  1944 Apr 6 - 1945 May 2

  Reference

  HW 5/718

• Catalogue level

  Piece

  Further decrypts relating to the development and deployment of V weapons, including...

  Further decrypts relating to the development and deployment of V weapons, including British defensive measaures

  Held by

  The National Archives, Kew

  Date

  1944 May 2 - July 19

  Reference

  HW 5/710

• Catalogue level

  Piece

  MSS reports relating to guided weapons selected for Dr R V Jones and CROSSBOW watch

  MSS reports relating to guided weapons selected for Dr R V Jones and CROSSBOW watch

  Held by

  The National Archives, Kew

  Date

  1944 July 2 - 1945 Apr 13

  Reference

  HW 5/722

• Catalogue level

  Piece

  Further decrypts relating to missile testing at Peenemuende and operations involving...

  Further decrypts relating to missile testing at Peenemuende and operations involving deployed units

  Held by

  The National Archives, Kew

  Date

  1944 Sept 25 - Oct 29

  Reference

  HW 5/713

• Catalogue level

  Piece

  Decrypts of "KLAVIER" code messages relating to flying bomb activity

  Decrypts of "KLAVIER" code messages relating to flying bomb activity

  Held by

  The National Archives, Kew

  Date

  1944 July 22 - Sept 1

  Reference

  HW 5/728

• Catalogue level

  Piece

  Decrypts of "KLAVIER" code messages relating to flying bomb activity

  Decrypts of "KLAVIER" code messages relating to flying bomb activity

  Held by

  The National Archives, Kew

  Date

  1944 July 7 -21

  Reference

  HW 5/727