The American inventor Edward Hebern (1869-1952) designed a series of machines for encrypting messages. The Smithsonian collections include a few of these as part of accession 1991.0190. Like many inventors, Hebern accumulated a variety of spare parts. These are some of them, part of museum transaction 1991.3033.
In this piece, two attached steel discs with geared edges and a circle of holes are attached to a black bakelite ring with no wiring. The rotor is Incomplete.
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