Old hand cranked grinder or tool and knife sharpener with old green paint. This is from an old farm estate and it has a primitive wood handle on the crank.
This grinder has a gear box drive that steps up the speed of the grinding wheel to many times the speed the handle is turned at.
It measures about 10 " high and 4 1/2 " across the aluminum oxide grinding wheel. This turns well, but it does have soil and light rust.