Some type of wirling mixing device?

Yet one more tool form the auction. This certainly appears to be some type of mixing or stirring device but there is no text on it and there is no real stationary handle to hold it while in use so not sure how it would have been used. Perhaps part of another piece of equipment? The motion is a bit jerky so I plan on taking the covers off and trying to clean it up and put it in my booth but a bit if info and use, what era, etc would be very helpful.

Any information that can help me identify this would be most appreciated. I will be posting some of the other tool finds as well though not all are mysteries.

Thanks.... Doug