What is it? A Guessing Game

Today, we went around the vehicle graveyard with a scrap dealer that my mom called, to check out what is here that might be hauled away.  Among the old farm equipment was this.  Can you guess what it is, or what it does.

Here is the front of the device.

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And here is a look at the other side.

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I have fond memories of using this thing!

The Re-Farmer