Again, it's important to be sure the parts are original on the music equipment to get a valid date for the amp.
Dating fender amp speakers
Please keep in mind that those components must be original to get a valid date for a vintage guitar amplifier.
Other sources to date your amp may include serial numbers and overall look and visual components on the amp as well.
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.
Well, this universal “truth” was debunked when we found a bunch of amps with transformers made by the Better Coil and Transformers company.
Guitar amplifier dating by serial numbers - How To Date A Guitar Amp or Bass Amp By Serial Number.Only way to get the actual manufacture date for these newer amps is to contact Fender support and ask them about that serial number.Old or new the Hot-Rod's do not hold much value very well, and just depreciate. Besides, no article in the Dating Fender Amps by Serial Number series would be complete without some interesting information, n’est ce pas? I promise the tables will still be there after you finish reading. 10/24/2008Note: it mentions that hot-rod amps built 2002 and later no longer have a date stamp in the amp.