Since the neck is only a component of the guitar, it could have been produced a number of years before the actual instrument was assembled, hence the date on the neck is not necessarily the production date of the whole guitar.
As mentioned there is only ONE way to date a Fender guitar, the penciled data inside the neck pocket and heel of the neck Fender serial numbers are NOT and NEVER were ment for aftermarket dating, this is well known Having worked there from 1977 until 1984 let me tell you how it worked.
Fender’s amps, unlike their guitars, are not tracked by the serial number.
I wish I could say that I figured all this out on my own.
While doing research on Fender amps in general, and the Champ in particular, I came across the most amazing series of articles by Greg Gagliano on the subject. If you have any interest in vintage Fender tube amps, without question you’ve got to read them all.
On my 1959 tweed Champ amplifier, the serial number is located right in front of the fuse cap.
It is stamped into the chrome chassis with a white letter “C” (for Champ) and the serial number, also in white.
Champion 800 (green tweed)* 01 to 1000 – 1948-49 Champion 600 5B1 (two tone) 01 to 1300 – 1948-49 1300 to 1700 – 1950 1700 to 5000 – 1951-52 5000 to 5500 – 1953 Champ 5C1, 5D1 (tweed) 5500 to 6600 – 1953 6600 to 8000 – 1954 8000 to 9999 – 1955 Champ 5E1, 5F1 (tweed) C00001 to C00800 – 1955 C00800 to C03100 – 1956 C03100 to C06000 – 1957 C06000 to C08800 – 1958 C08800 to C12500 – 1959 C12500 to C15500 – 1960 C15500 to C16800 – 1961 C17000 to C19000 – 1962 C19000 to C21000 – 1963 C21000 to C23000 – 1964 So we can see that a serial number of C 09556 is pretty close to the lower end for serial numbers for 1959 5F1 tweed Fender Champs.
Combined with what we saw with dating a tweed Fender Champ by the tube chart and speaker code, I’m feeling pretty good that all of the various dating methods point to early 1959 for my amp.
If you have a Fender Jag-Stang use the Serial Lookup Tool in the Registry: Fender Jag-Stang Serial Number Lookup Tool For other Japan made Fender guitars see this page: Japanese Serial Number Dates and this japan page For those american made Fenders guitars see this page: American Serial Number Dates Mexican made guitars generally follow the following rules: ex MN812323 – the first 3 characters are whats important [M] = made in Mexico [N] = 90’s (Z means zero for 2000, etc…)  = year 8 = Mexico 1998 more examples…
[MZ1XXXXX] = 2001, [MN4XXXXX] = 1994 Also see this page for Mexican serials For any fender, if you want the exact year you will need to check the date stamped on the butt end of the neck.
For more information, please visit this site: Fender Support kcbuck So...