I now have my grandfather's old Super A. After going through some of the items, I have found many things I haven't figured out what they are yet. One of the things in question is a bar/implement clamp and wedge bolt. It isn't the standard clamp that wraps completely around but forms a "C" shape when viewed from the side. I have 3 of these. Are they the original type that came with the tractor? Not sure what they would have came with and why there are only 3. I also have the original manuals for the tractor and many implements. The only clamps shown are the wrap around ones. Any ideas?