AB TRANSVERTEX; SWEDEN, CIRCA 1950

Details

AN HC-9 CIPHER MACHINE
AB TRANSVERTEX; SWEDEN, CIRCA 1950
serial number plaque M 3858-301010 KRYAPP 301 TRAEX HC 9 24750, the five rotor machine in green rubber carrying case.
7 x 8 x 3½ in. (17 x 21 x 9cm.) in case

Literature

https://www.cryptomuseum.com/crypto/transvertex/hc9/

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Lot Essay

Designed for relatively low level military use by the Swedish forces, the HC-9 was also well used in South American It embodied some new ideas in mechanical cryptography with alleged high resistance to cryptanalysis. The rear of the machine features a series of pins, combinations of which would be depressed by a punch key-card and the front window would have shown a randomised alphabet pairing on a rotating alphabet sheet of 16 lines. These the alphabet sheets and key cards were destroyed by the Swedish government when the HC-9s were declassified.

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