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The Transvertex HC-9 Cipher Machine
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This page under construction but for some information on the HC-9 see:
Deavours, C. A. & Louis Kruh, 'The Swedish HC-9 Ciphering Machine', Cryptologia, Vol. XIII(3), July 1989, pp.251-265
Deavours, C. A. & Louis Kruh, 'The Swedish HC-9 Ciphering Machine Challenge', Cryptologia, Vol. XIV(2), April 1990, pp.139-144
Torbjoern Andersson's HC-9 page