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• Catalogue level

  Piece

  HAR00012795.pdf

  BCM GRC, drawing entitled Bracket Type 3, Z-HW-2881-B3 Rev AEvidence provided by: Harley

  Held by

  The National Archives, Kew

  Date

  2015 Oct 08

  Reference

  GTI 2/VC3W/Z/1

• Catalogue level

  Piece

  HAR00012795.pdf

  BCM GRC, drawing entitled Bracket Type 3, Z-HW-2881-B3 Rev AEvidence provided by: Harley

  Held by

  The National Archives, Kew

  Date

  2015 Oct 08

  Reference

  GTI 2/VC3W/Z

• Catalogue level

  Piece

  BSD00002167.pdf

  BCM GRC LTD, drawing titled bracket type 3, Z-HW-2881-B3Evidence provided by: Bespoke Design

  Held by

  The National Archives, Kew

  Date

  2015 Oct 08

  Reference

  GTI 2/T73X/Z/1

• Catalogue level

  Item

  3/NBF/C15: List of covernames and name designators used in Naval attache traffic...

  3/NBF/C15: List of covernames and name designators used in Naval attache traffic - see HW 15/62

  Held by

  The National Archives, Kew

  Date

  1940-1949

  Reference

  HW 15/59/15

• Catalogue level

  Piece

  The History of Hut 3 (1940-1945) Volume II. Histories of 3L (Liaison), SDE (selection...

  See also HW 3/120. For Volume I, see HW 3/119

  Held by

  The National Archives, Kew

  Date

  1940 Jan 01 - 1945 May 31

  Reference

  HW 43/64

• Catalogue level

  Piece

  HAR00008107.pdf

  BCM GRC Drawing Entitled "Column Encasements - Bracket Type 3", Z-HW-2881-B3 Rev AEvidence provided by: Harley

  Held by

  The National Archives, Kew

  Date

  2015 July 27

  Reference

  GTI 2/SPKB/Z

• Catalogue level

  Piece

  HAR00008107.pdf

  BCM GRC Drawing Entitled "Column Encasements - Bracket Type 3", Z-HW-2881-B3 Rev AEvidence provided by: Harley

  Held by

  The National Archives, Kew

  Date

  2015 July 27

  Reference

  GTI 2/SPKB/Z/1

• Catalogue level

  Item

  3/NBF/C21: Covernames, codewords and personal names in Moscow - London GRU messages....

  3/NBF/C21: Covernames, codewords and personal names in Moscow - London GRU messages. See HW 15/43-47 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/18

• Catalogue level

  Piece

  RYD00054083.pdf

  Harley drawing prepared for BCM GRC Ltd. entitled Bracket Type 3, Z-HW-2881-B3 Rev AEvidence provided by: Rydon

  Held by

  The National Archives, Kew

  Date

  2015 July 27

  Reference

  GTI 2/SVJ3/Z/1

• Catalogue level

  Piece

  RYD00054083.pdf

  Harley drawing prepared for BCM GRC Ltd. entitled Bracket Type 3, Z-HW-2881-B3 Rev AEvidence provided by: Rydon

  Held by

  The National Archives, Kew

  Date

  2015 July 27

  Reference

  GTI 2/SVJ3/Z

• Catalogue level

  Series

  Government Code and Cypher School and predecessors: Personal Papers, Unofficial Histories,...

  This series contains correspondence, working papers and initial drafts of both official and unofficial histories of British signals intelligence (sigint).The records focus on prominent individuals and events, such as the deciphering of the Zimmerman …

  Held by

  The National Archives, Kew

  Date

  1914-1945

  Reference

  HW 3

• Catalogue level

  Piece

  Clarke's history of Sigint in Room 40, 1916-1919, with appendix written by Captain...

  Clarke's history of Sigint in Room 40, 1916-1919, with appendix written by Captain Hope, first chapters covering Room 40 written in 1951, final, in retrospect section, covering overall period 1916-1945, written in 1959

  Held by

  The National Archives, Kew

  Date

  1948-1959

  Reference

  HW 3/3

• Catalogue level

  Item

  Activity by Spanish Nationalist Air Force

  Activity by Spanish Nationalist Air Force

  Held by

  The National Archives, Kew

  Date

  [1937 July 15-1937 Nov 26]

  Reference

  HW 21/3/3

• Catalogue level

  Piece

  R.S.S Traffic Report Number 43, 17th to 30th December 1942. R.S.S. Service Reports...

  R.S.S Traffic Report Number 43, 17th to 30th December 1942. R.S.S. Service Reports 10 March 1943 to 1 August 1944 and 8 February to 4 April 1945. The series began as Fortnightly Traffic [interception] Reports, but from February 1943 became 'monthly i…

  Held by

  The National Archives, Kew

  Date

  1942 Dec 17-1945 Apr 04

  Reference

  HW 34/3

• Catalogue level

  Piece

  Catalogue of Party Histories and Other Supporting Papers Prepared for the GC&CS Histories....

  Catalogue of Party Histories and Other Supporting Papers Prepared for the GC&CS Histories. List of the various histories to be written with key topics

  Held by

  The National Archives, Kew

  Date

  1914 Aug 01 - 1945 Aug 31

  Reference

  HW 50/3

• Catalogue level

  Piece

  SS Reports January 1944. Free-French, Netherlands Intelligence Department, London,...

  SS Reports January 1944. Free-French, Netherlands Intelligence Department, London, and Polish military, London

  Held by

  The National Archives, Kew

  Date

  1943 Dec 23 - 1944 Jan 31

  Reference

  HW 74/3

• Catalogue level

  Piece

  Correspondence with the French on German meteorological cyphers

  Correspondence with the French on German meteorological cyphers

  Held by

  The National Archives, Kew

  Date

  1939 Oct 01 - 1939 Oct 31

  Reference

  HW 54/3

• Catalogue level

  Piece

  History of the Photographic Section by J A Hill, Ilford Ltd, Ilford, Essex

  History of the Photographic Section by J A Hill, Ilford Ltd, Ilford, Essex

  Held by

  The National Archives, Kew

  Date

  1943 Jun 01 - 1945 Aug 31

  Reference

  HW 3/188

• Catalogue level

  Piece

  Exchanges between Admiralty and British Naval Attaché Washington on events related...

  Transferred from HW 7/11 in August 1995

  Held by

  The National Archives, Kew

  Date

  1917 Feb-Mar

  Reference

  HW 3/178

• Catalogue level

  Piece

  GCCS bids for additional Treasury funding for proposed model new clerical establishment:...

  GCCS bids for additional Treasury funding for proposed model new clerical establishment: Treasury requests more details

  Held by

  The National Archives, Kew

  Date

  1936

  Reference

  HW 3/58