The Canadian Army used the Portex system in the early 1960's but it is not known how long it remained in service.
With top cover in the up position. This is the front panel of the Portex with BID/50/1 nameplate visible. Carrying handles unfolded. Rotor assembly. (All photos in this table by John Alexander, G7GCK Leicester, England.
The green coloured Portex displayed at the Royal Signals Museum appears to be a later version of the black coloured Portex. There is a series of pushbuttons above the rotor slots. These pushbuttons manually control the stepping of the rotors to the appropriate setting before beginning encryption/decryption.Nov 22/15
Above and below: Portex equipment taken at Blandford Forum Royal Signals Museum, Dorset, UK. Rotor storage case - the rotors were quite similar to Typex rotors except Portex rotors were smaller. (All photos courtesy John Alexander, G7GCK Leicester, England.)
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