is the last digit of the year (e.g., 9 1234 is 1959). 1902–1961 FON System
YDDDYRRR or YDDDYRRRR (8 or 9 digits)
During this era, Gibson introduced a system that many collectors know by heart. For the most iconic years (roughly 1952–1961), the first digit of the serial number indicated the year. For example, a serial number starting with a likely hailed from 1959 or 1960 (specifically, 9 0001 to 9 9999 cover 1959, shifting into 1960). It was an era of relative clarity, where the ink stamped into the wood corresponded neatly with the calendar. gibson guitar serial number
For collectors, this period requires a detective’s eye. A 1976 Les Paul might have a serial number that looks exactly like a 1977 model. One must look beyond the numbers—to the pot codes (the date stamps on the volume/tone potentiometers), the construction of the neck volute, and the type of bridge. The serial number became a clue, not a confirmation. is the last digit of the year (e