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One of the lesser known version of Douglas' Engels Puzzlers.
This came with a card attached from General Symetrics Inc. (Puzzles , Games, Diversions).
Also known as Jentek#2.
Courtesy, The Lilly Library, Indiana University, Bloomington, Indiana
The first year of production is unknown but Jerry Slocum acquired the sample shown in image 2 in 1982.
Thank you to the following people for their assistance in helping collect the information on this page: Oscar Rosen.
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