Rd400 serial number dating
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.(If you are not comfortable performing this operation, please use an experienced professional guitar tech in your area).The following chart details the Fender serial number schemes used from 1965 to 1976.
If you have serious interest in learning about the history of Fender instruments, or if you just want to try to establish the year of production of your own axe, we would highly recommend that you pick up one or more of the following books.The following chart details the Fender serial number schemes used from 1950 to 1964.You will notice that there is quite a bit of overlap of numbers and years.As you can see by the overlaps of numbers and years, the reference to the actual production date is rather loose. The serial numbers do not reflect the change, as Fender continued to make instruments using existing tooling, parts, and serial number schemes.
With 1990 came the introduction of the "N" prefix serial numbers, which stood for the 1990s.
They were stamped on the back vibrato cover plate (early '50s Strats), and on the bridge plate between the pickup and the saddles on some Telecasters.