Portex

Portex (or BID/50/1) was a British cipher machine. A rotor machine, the device used eight rotors each with a tyre ring and an insert. The machine was used mainly by the secret services from the late 1940s to the early 1950s.

See also

  • BID/60
  • KL-7

References

  • Information card, Bletchley Park Enigma and Friends exhibit, put together by David White and John Alexander, October 2005 1.