An amp stamped NA would have been made in Jan. Fender Tube amp codes: 1953-1970 - (look for a 2 letter code stamped on the tube chart inside the back of the amp)- the first letter is the year, and the second letter is the month. This information is not for commercial use, and cannot be copied, posted, pasted or otherwise used in any publication or web site. Superior Music - Fender Amp, Amplifier Serial Numbers Fender Amps FENDER Tube Amplifier / Amp / Serial Number, Date - Dating, Speaker code & Tube Information by Chuck Kotlaris This data base is for use for dating and verifying your amp.
