Sunday, April 22, 2012

M-209 instructional video

Here is a nice video from youtube. It’s an instructional video for operators of the American M-209 cipher machine. It explains how the machine is set up, what the external and internal indicator are and how to encipher and decipher.

The M-209 was used widely by the US armed forces in WWII.

The video has four parts. This is the first one.

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