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CX - 52 / C -52
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CX-52/C-52 by Crypto AG

The CX-52 was originally produced in a rotor vesion followed by a random paper tape (RT) reader version (CX52RT 200Type32) Both were made in Sweden by AB Cryptotenik, Sweden for Crypto AG in Zug, Switzerland.

So what is the basic difference between the Hagelin C-52 and CX-52? - It's the way the pin wheels step. On the C-52 model, the stepping is somewhat similar to the one on the C-38 (M-209). On the CX model, the stepping depends on settings of the pins and the lugs on the drum, and are highly irregular. They also have different wheels, where the C has a selectable set of 12 different pinwheels (more or less co-primes) and the CX has normally 6 identical pinwheels. Nonetheless, there are many customized versions of the C(X)52.

Cranking the side lever operates the machine but an additional keyboard unit, motorized this action thus increasing the throughput of the machine. The lubricating plan can be seen on the top face of the keyboard unit. Please note the image with the red border is only to show the machine with its matching keyboard unit, the B52. When the CX-52 machine is used with the B52 keyboard it's known as the BC52.

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A B621 keyboard assembly - front view. (E-bay photo)
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End view. (E-bay photo)
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Rear view. (E-bay photo)
This is the copy which accompanied the B-621 keyboard while it was on sale on E-bay.

"An AC/DC electric drive unit with keyboard for use with the Hagelin C52 cipher machine which provided the ability for the mechanical machine (C52/CX52) to be used at speed and also for use with larger, purpose built crypto off-line equipment. Nothing else known about this device"