Early 1900's Theo Koch Barber Chair

This is a Theo A. Koch barber chair from around 1916. I'm pretty sure there was a Theo Koch patent in 1917 that came out and I beleive this chair would have had that patent if made after that time. So I think it's in between 1914 and 1917. I was hoping to know what the chair is worth restored. It has all the original porcelain with no damage. Were sending the various pieces off to be re-plated with nickel and having the chair proffesionaly re-upholstered. If anyone is interested in purchasing the chair we could customize it to your liking. It does have the headrest and not missing anything. I also have a razor stropper with patent of 1902. I also have a liscense to barber in the state of South Dakota from the original owner of the chair.