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  Item

  Appendix 3 New York (formerly Appendix C) - see HW 15/48 for message texts

  Appendix 3 New York (formerly Appendix C) - see HW 15/48 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/7

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  class="ref" href="HW-d1-c18">HW 18; German plans for sea-born invasion of Britain HW 48; Hut 6 and Hut 8 weekly reports HW 77.

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Series

  Government Code and Cypher School: Hut 3: Intelligence Reports on German Plans for...

  This series contains intelligence reports derived from intercepted decrypted German messages concerning German plans for the sea-born invasion of Britain.

  Held by

  The National Archives, Kew

  Date

  1940-1941

  Reference

  HW 48

• Catalogue level

  Item

  New York: "SMIT" reports on Lt. Col. William GAYLE and others.

  New York: "SMIT" reports on Lt. Col. William GAYLE and others.

  Held by

  The National Archives, Kew

  Date

  1943 Aug 23

  Reference

  HW 15/48/48

• Catalogue level

  Piece

  Reports in the series QT/7501 to QT/7750.

  Reports in the series QT/7501 to QT/7750.

  Held by

  The National Archives

  Date

  1942 Dec 01-1942 Dec 04

  Reference

  HW 20/48

• Catalogue level

  Piece

  Cryptographic Security: TELEKRYPTON cypher machine and tape.

  Cryptographic Security: TELEKRYPTON cypher machine and tape.

  Held by

  The National Archives, Kew

  Date

  1954 Mar-1954 June

  Reference

  HW 9/48

• Catalogue level

  Piece

  GC&CS Army and Air Force Sigint Volume V: The Organisation and Evolution of British...

  GC&CS Army and Air Force Sigint Volume V: The Organisation and Evolution of British Air Force Sigint II by Cmdr A M S MacKenzie RNVR

  Held by

  The National Archives, Kew

  Date

  1932 Jun 21 - 1945 Aug 30

  Reference

  HW 43/48

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Sep 01-1940 Sep 08

  Reference

  HW 29/48

• Catalogue level

  Piece

  Soviet Comintern messages: Service 9: Moscow to and from Poland. Moscow, callsigns...

  Soviet Comintern messages: Service 9: Moscow to and from Poland. Moscow, callsigns ENO, OLM, ZAJ and others; message serial numbers rise to 100 and re-start at 1; fair number of messages intercepted. Poland, various callsigns, few messages intercepte…

  Held by

  The National Archives, Kew

  Date

  1943 Mar 17-1943 Nov 20

  Reference

  HW 17/48

• 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 Jul 15-1944 Jul 24

  Reference

  HW 35/48

• Catalogue level

  Piece

  Romanian Special Service of Information, Directorate of People's Security and Ministry...

  Romanian Special Service of Information, Directorate of People's Security and Ministry of Internal Affairs miscellaneous reports

  Held by

  The National Archives, Kew

  Date

  1950 Jun 26 - 1950 Dec 05

  Reference

  HW 75/48

• 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

  1944 Aug 01-1945 May 31

  Reference

  HW 52/48

• Catalogue level

  Piece

  PDH 3 - F Reports to SSA, War Department [Signal Security Agency, Arlington Hall,...

  PDH 3 - F Reports to SSA, War Department [Signal Security Agency, Arlington Hall, Washington]. Cryptological liaison letters sent by Captain Walter J Fried from Bletchley Park to the US Army Sigint authority in Washington

  Held by

  The National Archives, Kew

  Date

  1944 Mar 31 - 1944 Nov 13

  Reference

  HW 53/48

• Catalogue level

  Piece

  Dossier. Middle East and North Africa and RAF Sigint Organisation. Notes made in...

  Dossier. Middle East and North Africa and RAF Sigint Organisation. Notes made in preparation for writing a history the of RAF Sigint organisation during the World War II North African campaigns (much of the material is in Nigel de Grey's hand)

  Held by

  The National Archives, Kew

  Date

  1936 Jan 17 - 1943 Dec 21

  Reference

  HW 50/48

• Catalogue level

  Piece

  52515-53688

  52515-53688

  Held by

  The National Archives, Kew

  Date

  1943 Feb 15-1943 Feb 28

  Reference

  HW 19/48

• Catalogue level

  Piece

  Battle Front West: German units and locations

  Battle Front West: German units and locations

  Held by

  The National Archives, Kew

  Date

  1944 Sept 2-1944 Nov 22

  Reference

  HW 13/48

• Catalogue level

  Piece

  Weekly summary reports on Second World War German army and air force communications

  Weekly summary reports on Second World War German army and air force communications

  Held by

  The National Archives, Kew

  Date

  1945 Apr 01-1945 Apr 20

  Reference

  HW 45/48

• Catalogue level

  Piece

  War (I) Programme Employment of sets

  War (I) Programme Employment of sets

  Held by

  The National Archives, Kew

  Date

  1939 Apr 01-1940 Jul 25

  Reference

  HW 2/48

• Catalogue level

  Piece

  Staff matters including recruiting, liaison with Oxford and Cambridge Universities;...

  Staff matters including recruiting, liaison with Oxford and Cambridge Universities; WRNS postings, commissions approved for certain Wrens working for BP, expansion of Stanmore to accommodate more Wrens and Cantab processing machines similar to work b…

  Held by

  The National Archives, Kew

  Date

  1942 Aug 1-10

  Reference

  HW 14/48

• Catalogue level

  Piece

  Visit to Estonia 1931. W/T [wireless telegraphy] log - DF [direction finding] station...

  Visit to Estonia 1931. W/T [wireless telegraphy] log - DF [direction finding] station at Warska. Log kept at DF site set up during initial exploratory visit of Warrant Officer (later Flying Officer and eventually Squadron Leader) W G Swanborough, OC …

  Held by

  The National Archives, Kew

  Date

  1931 Aug 12 - 1931 Sep 17

  Reference

  HW 61/48