The production numbers run in a consecutive order and, aside from a few oddities in the change over years (1961-1962), it is fairly accurate to use them when identifying solid body instruments produced between 19.Examples of this system: 4 2205 = 1954 614562 = 1956 In 1961 Gibson started a new serial number system that covered all instrument lines.
The second type of serial numbers used started with an A prefix and ran from 1947 to 1961. When production of solid body guitars began, an entirely new serial number system was developed.
Though not used on the earliest instruments produced (those done in 1952), a few of these instruments have 3 digits stamped on the headstock top.
Some time in 1953, instruments were ink stamped on the headstock back with 5 or 6 digit numbers, the first indicating the year, the following numbers are production numbers.
In general though, the numbers are approximately as follows: From 1970-1975 the method of serializing instruments at Gibson became even more random.
It consisted of numbers that are impressed into the wood.It is also generally known to be the most frustrating and hard to understand system that Gibson has employed. There are several instances where batches of numbers are switched in order, duplicated, not just once, but up to four times, and seem to be randomly assigned, throughout the decade.