His particular area of expertise is in Fender amps made from about 1960 through 1967.
Devin runs Doc's Music in Springfield, Missouri and his interest lies in the woodie and tweed Fender amps made from 1946 through 1960.
Our evidence is that we are finding some serial numbers duplicated between models.
Greg is a long time Fender collector who is very knowledgeable not only in the details, but in the circuitry as well.This makes things a little more interesting and difficult in playing the "dating game." And yet there is another variable to contend with as it appears that models that share chassis may also share the same serialization scheme.For instance, the Bandmaster Reverb and Super Reverb share the same chassis, and the Twin Reverb, Quad Reverb, Dual Showman Reverb, Vibrosonic Reverb, and Super Six all share the same chassis.To give an example, a typical Oxford speaker from the ’60s will look something like: 465-217.465 designating the Oxford EIA code, 2 designating the year 1962, and 17 designating the 17th week of ’62.Preliminary results show that we're on the right track.Here's a couple of examples using the tweed Deluxe (model 5E3) and the Super Reverb/Bandmaster Reverb. Model Year D05108 Deluxe 1958 D05160 Deluxe 1958 D06528 Deluxe 1958 D07036 Deluxe 1959 D07115 Deluxe 1959 D07418 Deluxe 1959 D08325 Deluxe 1959 D08913 Deluxe 1959 D09014 Deluxe 1959 D09338 Deluxe 1960 D09399 Deluxe 1960 D09524 Deluxe 1960 A27769 Super Reverb 1967 A27796 Super Reverb 1967 A29591 Super Reverb 1968 A31057 Super Reverb 1968 A31079 Bandmaster Reverb 1968 A32839 Super Reverb 1968 A32841 Super Reverb 1968 A34448 Super Reverb 1968 A37667 Super Reverb 1969 A37949 Bandmaster Reverb 1969 A40130 Bandmaster Reverb 1969 A41569 Super Reverb 1969 So, with the knowledge gained thus far, we feel that Fender tube amps can be dated by serial number.These say "Fender Electric Instruments." Depending on the model the use of these pre-CBS panels have been observed on amps as late as August 1965, except for Champs and Vibro Champs which had foil stickers on the back the chassis.Fender must have had a million of these labels printed up since they appear on Champs and Vibro Champs well into 1966.The factory realized its mistake in February because these amps have a "PB" date code in black ink.Now, we obviously haven't looked at every amp made in January 1966 so this isn't set in stone.