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| This is a prototype device developed by R.R. Landsberger in the 1920s. An NCM exhibit. (Both photos by Ralph Simpson) |
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| This is a closeup of the middle disk. |
Does anyone have any more information on this device? If so, contact Jerry.proc@sympatico.ca
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| This is a prototype device developed by R.R. Landsberger in the 1920s. An NCM exhibit. (Both photos by Ralph Simpson) |
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| This is a closeup of the middle disk. |
Contributors and Credits:1) Ralph Simpson <ralphenator(at)gmail.com>
2) NCM placard
Back To Menu Page Apr 21/12