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Hello~ I have recently been asked to hunt information about a Columbia Twin Falls. I have only been able to find that it was manufactured by Groetchen Tools & Manufacturing, possibly in 1947. I believe the end goal of the information finding will be to sell the machine, still in working order. Does anyone have any information or price comparisons to help me out? Thank you for time and consideration.

If you could post some pictures, and a description of the condition, that would be a great help.

This one sold at auction in 2007 for $570.
It appeared to be in very good working condition.