Military and intelligence history mostly dealing with World War II.
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.