The pattern is as follows: YDDDYRRR YY is the production year DDD is the day of the year RRR is the factory ranking/plant designation number.
Prior to 1984 when the Kalamazoo, MI factory was closed, the numbers 001-499 indicated Kalamazoo production.
Wondering how old your Gibson or Epiphone guitar is?
Maybe you have a Gibson banjo, dobro, or a Goldtone amplifier you’re not sure about.
The sixth number is now a batch number- batch 0 starts at the beginning of the day, and once we stamp 699, the batch number will change to 1.
The first 5 numbers remain the same, the last 3 numbers will remain the same.
This guide, republished courtesy of Gibson.com, provides information from 1975-present, covering thousands of Gibson instruments.
The 1st digit indicates the year of manufacture for the 4 & 5 digit serial numbers, these were used from 1989-1999.
The 1st and 2nd indicate the year of manufacture for the 6 digit serial numbers which we’ve been using since 2000.
The only difference is the addition of this batch indicator.
There are always exceptions to these rules, the two listed below are worth noting: Les Paul Classic: This model features an ink stamped serial number with no “MADE IN USA” (just as we used on the original 1952-1960 Les Pauls).
Most will be 5 to 6 digits in length, but the earliest examples feature 4 digit serial numbers.