This black-and-silver sticker contains several lines for “sign-offs” on completion of sound and electrical testing.
The final line contains a date code of two printed or handwritten letters denoting the amplifier’s production date by year (the first letter) and month (the second letter).
Information on Japanese and Mexican-made instruments is included towards the bottom.
If you have a Fender in your hands, you can use this guide to precisely date your Fender instrument all the way back to 1950.
Several different types, in vertical and diagonal weaves, were used.
Please note that it’s quite difficult to precisely determine the production date of early Fender amps.
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.