Yes to everything Jon just wrote. A machine named just "Minnesota" isn't common, the lettered Minnesota ones seemed to have been more popular. I have one just like it, only a little younger, and she makes a nice stitch. And mine isn't in as good of shape as yours. You're lucky to have a nice herloom Rhubarb.
Sauki1, I think you have a Minnesota made by National. After Davis went belly up, National bought up all their production stock, equipment, etc. So your machine might take Davis parts, or it might take National parts. Does it have a needle, bobbin, or shuttle with it?