Before you can date your chair, you must locate the stamped identifier. Koken typically placed these numbers in consistent locations:
: Be careful not to confuse casting numbers (e.g., "52CB") with serial numbers . Casting numbers are part identifiers used during manufacturing and are shared by all chairs of that specific model, whereas serial numbers are unique sequential identifiers. Koken Barber Chair Timeline & Serial Ranges vintage koken barber chair serial number list
: Some later models (circa 1920s–1930s) featured a small metal tag riveted to the frame under the seat or on the back of the footrest. Before you can date your chair, you must