Catalogue description Naval Miscellaneous Papers January-April 1943 These papers, collected by Frank Birch,...

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Details of HW 8/27
Reference: HW 8/27
Description:

Naval Miscellaneous Papers January-April 1943

These papers, collected by Frank Birch, Head of Naval Section, reflect the daily operations and changing organisation of Naval Section.

  • 16/2/1943 U559 Enigma.
  • 4/1/1943 Turning points in Enigma history (2 pages).
  • 19/2/1943 Introduction of umkehrwalze in E machine (C.H.O'D Alexander)
  • 11/3/1943 U205
  • 22/4/1943 Use of American bombes in OP-20-G by"BP".
  • 20/4/1943 'Y' organisation in the Mediterranean.
Date: 1943 Jan 01-1943 Apr 30
Held by: The National Archives, Kew
Legal status: Public Record(s)
Closure status: Open Document, Open Description
Access conditions: Retained Until 2002
Record opening date: 02 September 2002

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