The serial number can be found stamped or punched on the back of the headstock or acoustic in the sound hole. The acoustic models have been manufactured in Bozeman, Montana since the end of 1989.

How do I tell what year my Les Paul is?

The first digit of this style serial number indicates the last digit of the year it was manufactured. For example, this Les Pauls serial number is 7_6227 so it was made in 1957. This is how to date a Gibson Les Paul from the 1950s.