Squire bass serial number dating information
The only way to try to narrow the date range of your specific instrument would be to remove the neck and check the butt end of the heel of the neck for a production date, which may be stamped or written there.
Determining the date can also be important from a collector’s perspective, since the pre-1966 vintage Fender guitars are generally considered the most valuable.
Fender was sold to CBS in the first week of January 1965, but already in late 1964 mass production was slowly being introduced, which gradually lowered quality and ultimately collectibility.
The serial numbers do not immediately reflect the change, as CBS continued to make instruments using existing, tooling, parts, and serial number schemes.
The following chart details the Fender serial number schemes used from 1965 to 1976.
The neck date simply refers to the date that the neck was produced.