WW2 telephone encryption device

[robrinay]

I’m selling a strange device for a friend - it’s in Classifieds under the same heading as above. As it only really relates to this section I’m flagging it up here. Even if you’re not interested in buying it it’s worth checking out the links I’ve copied into the listing which explain how such devices were used and how they evolved. eBay don’t allow active links in listings so you’ll have to copy them into your browser to see them. One is a YouTube a mate and me filmed another is from Wikipedia and the third is from a virtual cryptography website.