Koken Manufacturing Company produced barber chairs from 1903 to 1965. The serial numbers range from 1 to approximately 55,000. The following table provides a breakdown of the serial number ranges and corresponding production years:
| | Production Year | | --- | --- | | 1-5,000 | 1903-1920 | | 5,001-15,000 | 1921-1935 | | 15,001-25,000 | 1936-1945 | | 25,001-35,000 | 1946-1950 | | 35,001-45,000 | 1951-1955 | | 45,001-55,000 | 1956-1965 | vintage koken barber chair serial number list
The following list provides specific serial numbers for various Koken barber chair models: Koken Manufacturing Company produced barber chairs from 1903