Instead, there were approximately 2000 of these chasses produced, which then ended up as one of the three models in question.
It would be more accurate to say that approx 650 of each of these models were produced in ’60.
In order to date a Fender amp or provide the value, you need to know one of the below: * The 2 letter date code rubber stamped on the Tube Chart, or * The 2 letter date code on the QA Sticker, or * The Transformer Number that starts with “606-XX-XX”, with the 3 or 4 Xs being the unknown numbers that need to be provided by the owner of the amplifier asking the question.Remember, your amp is newer than the newest component.So if you find pots from late 68 and transformers from early 69 you can be pretty sure your amp is a 1969.Here is a cool link to a Vintage Fender Amp price history chart that tracks sales data for specific amp models by the month.Date Code: Wide panel, narrow panel, brown, blonde, and black face amps have a date code hand-stamped on the tube chart. The first letter translates to the year and the second to the month. Example: FG=July 1956, QA=January 1967, and a reissue CG=July 1992 EIA Source-Date Codes: Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when.