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Collections in Cryptology - Rotors
Key mechanisms in computation...
U.S. Sigaba

SIGABA - one large and one small rotor - without wiring.

SIGABA image courtesy of the National Cryptologic Museum.
Russian Fialka M-125

Fialka, four RED rotors. Note that the alphabet is printed on the CIRCUMFERENCE of the disk.


 Fialka with RED rotors - National Cryptologic Museum.

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Fialka, BLACK rotors, front, back and exploded. Note that the alphabet is printed on the SIDE of the disk.
The contacts on the black back side are spring-loaded wire loops.

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Fialka, single inner disk of a BLAC rotor,containing the wiring, front, back and backlit view showing the wiring.
This inner disk can be inserted in 60 different ways: 30 rotational positions flipped two ways.
Russian M-155 Rotor Set
When opened, the rotor may be rewired by rerouting the spring-loaded pins to different sockets.

Unknown Rotor
Lathe turned fabric-based phenolic with brass escutcheon pins.


If you can identify this, please let me know.