If you look at it, make sure the VS works. That I think may be hard to replace, not sure. Course make sure it runs. The clamp Hotshot mentioned is this one I think: https://www.advmachinery.com/products/hegner-quickclamp
I would not own a Hegner without that clamp. It makes it so much more user friendly. On the bottom clamp there are two sizes, one for #5 and smaller blades, and one for #7 and larger. Unfortunately they do not come marked, so I do not know which one I have on mine anymore, but it works fine. They should stamp them so a person would know.