Files W.F.F. Archive Reports and Research Notes Correspondence, Memoranda, Working Notes, Diagrams, Dr. Grimsen, and Hagelin Laboratories, 1954-1957
Brochure on the Lorenze Mixer Unit, 29 January 1955
Cryptographic Device of Dr. Oskar Vierling (W 002), 29 September 1953
Cryptographic Device of Dr. Oskar Vierling (W 009) , 16 December 1953
Cryptographic Device of Dr. Oskar Vierling, 16 December 1953
Handwritten List of Documents Regarding Dr. Grimsen, 19 February 1955
Handwritten Notes Regarding Cryptographic Equipment Orders, 17 February 1955
Letter from Hagelin Jr. Regarding Order, 10 March 1955
Letter to "Bo" Hagelin Re Canceling Original Order and Replacing New Order, 30 March 1955
Mixing Device Manufactured by Dr. Grimsen of C. Lorenz, A.G (W020), 1 June 1954
Report of Demonstration of an Invention, 23 October 1954
Status of Equipment on Order, 10 February 1955
Visit to Dr. Grimsen, 15 November 1954; Visit Concerns Mixing Device
Visit to G-40, 26 February 1955
Visit to Hagelin Laboratories
Visit to Weintraud, 2 February 1955; T&N Cipher Machine
West German Use, 6 December 1954