Dating fender solid state amps
Fender later constructed them with "narrow panel", in which all the panels have more or less the same width.Toward the end, despite keeping such construction, Fender utilized Tolex to cover its amps.Fender amplifiers became established with the tweed series, wood cases covered in varnished cotton twill in the manner of suitcases of the era.(The nickname is a misnomer, as tweed is a coarse woollen fabric, often woven in a twill pattern.) They were produced for more than a decade.Grillcloth was initially the same as used in the previous tweed era, maroon with gold stripe.Beginning in mid to late 1961, Fender introduced another color combination: a smoother but still light brown tolex with a dark maroon or "oxblood" grillcloth.
These were considered a step above the student models (Champ, Harvard, Princeton) which remained tweed-covered in 1960.
While the majority of the piggybacks were produced in blonde tolex, there are a few examples of the brown tolex Bassman amplifiers.
Accomplishments for the company's amplifier division during these years include the introduction of the stand-alone spring reverb unit in 1961, followed by incorporation of the reverb circuit within a combo-amp design with the 1963 Vibroverb.
Leo Fender began building guitar amplifiers before he started manufacturing electric guitars.
The first of these were the K&F models, produced between 19.