Does anyone know where I can find information about Disston chisels and gouges for the lathe. I recently bought a set of eight tools in the box never been used. They are labeled Henry Disston and Sons, PA. They have maple handles with Disston insignia and the cutting steel also has Disston insignia. There is no zip code so they must be somewhat old. Every thing this doctor had was very old and of good quality. Are they collectors items? Are they made of the same hardness steel as the saws. How can I date them? I don't want ot use them until I determing their value, but I am almost certain I will keep them as users. Thank you for your help!