Look what Janet found in the back room of the antique shop. I was able to take a box of parts and assemble them, for the most part. I'm missing the part that holds one end of the flyer, and I have two pieces that don't seem to fit anywhere. There are no maker marks on it and, despite some mold, it appears to be in good shape.
Here's the flyer and a bobbin, and the two extra things.
There are two extra bobbins, even. I've been able to turn the wheel with the treadle. Figure I will clean it up and oil it, then look into finding the missing piece. If anyone has suggestions, please don't be shy of leaving a comment.