Crypto AG HX-63 Cipher Machine Bottom View

The HX-63 was an electromechanical rotor-based cipher machine, introduced in 1964 by Crypto AG in Zug (Switzerland). It features nine electrically wired permutations wheels, or rotors, that have more contacts than the 26 letters of the alphabet. The machine could be set up in around 10^600 different configurations. Only twelve of these machines were manufactured.