Often includes "MADE IN USA" stamp; numbers were reused and can be random. 6-digit Stamped
Pre-1977 systems are less consistent. If the serial number doesn't make sense, check the (usually 137 followed by the year and week) for confirmation. Key Identifiers 1975–1977 8-digit Decal Prefix 99 (1975), 00 (1976), 06 (1977). 1970–1975 6-digit Impressed gibson guitar serial number
Usually impressed or ink-stamped on the back of the headstock. Often includes "MADE IN USA" stamp; numbers were
No "MADE IN USA" stamp. Numbers were heavily reused; requires a lookup chart. Ink-stamped Often includes "MADE IN USA" stamp