Lots of different speakers were used in the blackface and silverface era Fender amps.In a BF Vibrolux Reverbs you could have either Jensen, CTS or Oxford, the BF Super Reverbs had Jensen, CTS, Oxford or sometimes JBL, the BF Pro Reverb had Jensen, Oxford or Utah, . Contains four 8-pin sockets, four "bear trap" retainers, eight mounting screws, four 470 ohm screen grid resistors (Metal-Film Flameproof for safety), and four carbon composition 1500 ohm control grid resistors. Founded in 1948 by Heinz Fischer and Alfred Tausche, F&T Capacitors has over 60 years of experience in producing some of the finest capacitors available today. Fender Vintage Amp (60s Blackface and 70s Silverface) Power Tube Socket replacement kit. ) from the original blackface and silverface eras which have four power tubes (6L6). Gold-Plated Solid-State Tube Rectifier Replacement. CAPACITOR, F&T BRAND, AXIAL LEAD ELECTROLYTIC, VARIOUS VALUES AND VOLTAGES AVAILABLE (SEE OPTIONS) Made in Germany.Other things to look for include chasses placed in cabinets from a different year, “doctored” tube charts, non-original control plates (usually reproductions) on silverface amps, original transformer bell ends (they have correct date codes, of course) on non-original transformers, and non-original knobs (either repro or silverface knobs on blackface amps).unusual things can be found such as the empty “Pulse Adjust” hole on the rear of early ’60 brown amps, the “middle” volume control, use of tweed style grill cloth, strange non-documented transitional circuits, and changes in tolex color including the super-rare cream colored “brown” tolex that is found on some late ’60 amps. Given that people may refer to this information seeking specific production quantities of amps they are curious about, it should be pointed out that the serial numbers apply to chassis types, and not specifically to amplifier models.Looking at serial numbers next to the ’60 5G5 brown Pro Amp for example, we see numbers ranging from 00001 to 02000, suggesting that there are 2000 of these amplifiers made in ’60.
and these changes are often disclosed and of a non-malicious nature.
When buying a vintage amp, you have to determine whether you are buying for tone or collectability (or both). You buy it and go on your way, skipping like a kid who just got an ice cream cone.
For tone you may not care about total originality; for collecting originality matters. After a while you notice something amiss or someone mentions that the grill cloth looks changed.
If the amp has been recovered, the glue will give it away. Counterfeit money, counterfeit art, counterfeit antiques, counterfeit guitars, counterfeit handbags, and believe it or not, counterfeit amps.
Incredibly so, there is/was a well known vintage dealer in the UK who has built Marshall copies (and probably others like VOX and Hi Watt) and sells them as original. They find old parts by gutting less valuable vintage amps.
There are also exceptions to the rules where Fender delivered non-standard speakers in special orders, Christmas campaigns etc. See our Buyer’s guide to vintage Fender amps for a guide and picture gallery of the known original speakers in the blackface and silverface amps.