Vox amp serial number dating
First, it will be useful to you to understand the following five terms in order to choose the correct chart for dating your amp: refers to the two-tone woven fabric that covered many early amplifiers.
On early amps, this material was varnished to make it a more durable covering.
These numbers always begin with “EIA 606,” and are followed by three or four digits in various combinations.
If three digits are present, the first digit refers to the year (i.e., a “7” would mean 1967).
For example, EIA 606-4-21 would denote the 21st week of 1964.
AC30 Serial numbers started with the number #4000 and JMI made around 20,000 AC-30's. It had a "W" as it had white knobs and was one of "The Shadow's" amps and made in early 1960. 1964 AC30 is "#12911 N" So by mid `64 they had already made nearly 9,000 AC30's.(8911).
They are detailed reference resources with a wealth of information on determining the production years of various amplifiers and on Fender history in general.
Indeed, we use these same books here at Fender when researching historical and date-related issues.
Dating early Fender amplifiers is sometimes quite challenging.
While dating Fender amps made before 1994 by serial number is all but impossible (as records of these numbers were never kept), all hope is not lost—the charts below should prove helpful in dating your Fender amp.