This is the easiest system to read. In July 1977, Gibson standardized an 8-digit numbering system that identifies the year, day, and rank of production.
To get the exact date for your specific guitar, use these resources: les paul guitar serial number lookup
The production rank. Numbers 001–499 typically indicated the Kalamazoo factory (pre-1984), while 500–999 designated Nashville. This is the easiest system to read
While a serial number can give you a year and a production rank, it does not tell you the whole story. To truly appraise a Les Paul, the serial number must be matched against the potentiometer codes, the fretboard wood, the inlay shape, and the bridge style. If you suspect you have a high-value vintage instrument, never rely on a web lookup alone—always consult a professional appraiser. If you suspect you have a high-value vintage
Here is where most people get tricked.