Crylto self-contained baud frequency division characters off-line or 12 hours basis. This is only the top half of the unit shown in the previous pictures. Specifically used in classified communications you have any info.
It is slightly bigger than the KL-7 and features a paper tape reader, a tape puncher and a different teletype keyboard. When entering numbers, the user first needs to press the FIG -key figures. After his arrest, Walker cooperated with the authorities and pleaded guilty, in order to lower the sentence of his son Michael. The information passed by John Walker and his spy ring, allowed the Russians to build an analog of the KL-7 and to find ways to mount a cryptanalytical attack on the machine [5]. Timing is guaranteed, as the pulse generator and the print head are driven by the same axle.
