In the last two decades in the 1800s, there have been a lot of mechanical advances manufactured inside the barber chair field including: Customized copper coins for barber customers are stamped with Koken's CO; St. Louis on a person aspect plus the identify with the barber shop on the other. https://antique-koken-barber-chai52123.jaiblogs.com/42372063/not-known-factual-statements-about-old-barber-chair-value