| Serial Number (Approx.) | Latest Patent Date / Model | Estimated Era | Key Features | | :--- | :--- | :--- | :--- | | | Oct 23, 1900 | 1900 - 1905 | Bicycle seat style, cast iron, very rare. | | 12,000 - 20,000 | June 9, 1908 | 1908 - 1915 | High back, ornate porcelain base, footrests with coin trim. | | 45,000+ | Aug 12, 1919 | 1920s | Heavy wood arms, "Koken" cast into the iron back plate. | | Varies (Model 11/12) | 1920s - 1930s | 1920s - 1930s | Distinctive flat armrests, single porcelain footrest. | | High 5-Digits | 1940s Patents | Late 30s - 40s | Transition to "President" model, streamlined metal. | | 6-Digits | Mid-Century | 1950s+ | Thick leatherette, more plastic components, "Imperial" styling. |
🧼 Clean with mild soap and a soft brush – paint often hides numbers. vintage koken barber chair serial number list
Serial numbers on Koken chairs are typically long and are stamped directly into the metal or wood of the chair rather than being on a removable tag. | Serial Number (Approx
patented in 1892. Because precise factory ledgers are rare, collectors rely on approximate serial number ranges and design features to date these pieces. Finding the Serial Number | | Varies (Model 11/12) | 1920s -
: Tilt the chair to see the underside of the main seat plate. The base pedestal
The following list provides specific serial numbers for various Koken barber chair models:
: This is the most common location. Look for numbers stamped directly onto the wood or the metal frame beneath the seat cushion.