| Information | |
|---|---|
| has gloss | eng: 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. |
| lexicalization | eng: Portex |
| instance of | e/Rotor machine |
| Media | |
|---|---|
| media:img | Portex.jpg |
| media:img | Portex1.jpg |
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