Authentic Gibson headstocks are known for a specific "ears" construction and a 17-degree pitch. If the serial number is on a headstock that feels too thick or lacks these details, it is likely a fake.
Contact (with clear photos of serial, headstock front/back, and control cavity). Or search online databases: gibson serial
The FON usually consists of a letter and a number. Authentic Gibson headstocks are known for a specific
Gibson’s history is famously "haphazard" when it comes to numbering, and several eras break the standard rules: gibson serial
During this transitional period, Gibson used a confusing system that can be difficult to decode.
Gibson also uses specific prefixes for special runs, such as: