CBS continued the sequence Fender started in
After the neck was finished, a Fender employee would either stamp or handwrite the date on the end of the guitar neck on its heel.
The only way to verify an over lapping date is to check the corresponding neck date and body date.
Here are a list of dates and codes that overlap years.
Description: Here are the rough serial number ranges for the early Esquires and Telecasters:. I say this only joking.