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CD-57 by Crypto AG

The CD-57 was a mechanical, handheld device derived from the CD-55 and was produced in 1956 and 1957 by the Crypto AG company. A variant, namely the CD-57 (RT), is the same device but it lacks rotors. Instead, it uses a reader for a one time tape. CD-57's were essentially unbreakable provided their one-time, tape system was properly handled and secured. The French, in particular, liked these CD-57's. Weight: 2 pounds.
cd57.jpg
The CD-57 with cover open (top) and cover closed (bottom). (Photo courtesy John Alexander, G7GCK)


cd57_rt_1.jpg
The CD-57 (RT) front view - bottom. (Photo courtesy John Alexander, G7GCK)