Late 1800's Koken Barber chair

Koken Barber chair round. This was my Grandfathers .He was a barber in Pomona California in the 1920' he had a set of three. I also have his barber cabinet and all his supplies in it. about a year ago I was thinking of re doing the seat and we lifted the bottom seat up and we found some real old dusty papers. They were the instructions on the chair. looks like they never been touched since it was placed in the chair. The chair is in working order goes up and down with handle. I am missing the ash tray on the right arm.