Greg and Devin's experience meshed well with mine since I'm essentially the blackface/silverface amp guy (amps made between 19) in the group.
Additionally, Greg and Devin also had data that they had been collecting from Fender amps for years. Everything is confidential, we don't make record of who owns what amp in the database.
There are other ways but the above is a more accurate method.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.: The transformer number tells you when the transformer was made and not necessarily the date the amplifier left the Fender Factory, the “2 Letter” date code on the Tube Chart or QA Sticker actually tells you that and that makes it the most accurate option for dating the month and year it was made....Dating Fender Tube Amps by Serial Number, Part I by Greg Gagliano Copyright 1997, 20th Century Guitar Magazine. Well, we'll get to good parts, but first a little background information is in order.After reading Teagle and Sprung's excellent Fender amp book, I took them up on their challenge that maybe someday someone will compile enough serial numbers so that Fender amps can be dated that way. I contacted several Fenders collectors and dealers who were kind enough to supply me with data.Per Blue Book and Fender Consumer Relations Department.