The most common among used guitars. Eight or nine digits. For eight-digit numbers: the first and fifth digits together represent the year (e.g., 9xxx2xxx = 1992). For nine-digit numbers: the first two digits are the year (e.g., 00xxxxxx = 2000). The second, third, and fourth digits indicate the day of the year (Julian calendar). The remaining digits are the production rank.
An eight-digit number. The first two digits indicate the year (e.g., “75” for 1975), the next two the month, and the last four the factory sequence. gibson serial number check
A nine-digit number beginning with “14” (year), then a space, then a letter indicating plant (e.g., “C” for Chicago), followed by six digits. The most common among used guitars