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SIGPOSI was a card/stencil system used from the 1930's and into WWII. Click on image to enlarge. (Photo by Ralph Simpson) |
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SIGPOSI was a card/stencil system used from the 1930's and into WWII. Click on image to enlarge. (Photo by Ralph Simpson) |
Does anyone have any more information on this device? If so, contact Jerry.proc@sympatico.ca
Credits:1) Ralph Simpson <ralphenator(at)gmail.com>
Apr 15/12