Dating guitar pots
The letter preceding the batch number in the FON, and indicates the year of production. Y1234 23 This were used from 1952 to 1961 on archtop models and stamped on the inside of the F-hole. An ink-stamped number from the back of the headstock. No serial numbers were used, Gibson just started therewith in 1953.The batch number, the first four digits of the FON, followed by a one or two-digit number. The first digit of the serial number is the last digit of the year.Some instruments from the fifties also had been such a stamp. The same confusing six-digit serial system of the sixties was maintained until 1975.This means that instruments with the same serial number can be from the 60s or 70s.The acoustic models are manufactured since late 1989 in Bozeman, Montana.Factory Order Numbers (FON) with a letter from 1935 to 1941.
Note that the series of between 19, may be an overlap from production in 19.
Gibson stopped the stamped serial numbers at the end in 1960, although there are a few guitars made in 1961 with a "1" as a prefix.
Some lap steels and Les Paul's from 1961 have such a serial number.
The table below shows the years in which the numbers could relate. The most sustainable numbering system Gibson was launched in 1977, an eight-digit number.
The first and fifth digit representing the year of manufacture.