 Nonetheless, Fender Musical Instrument Co. kept the image of the Twin-Amp before potential consumers during this short period.The image of the Twin-Amp in the 1960 Fender Catalog has been the subject of considerable scrutiny.The re-emergence of the Twin-Amp in mid 1960 revealed a new aesthetic design that would become prominent among Fender's top of the line amplifiers, with the exception of the Vibrasonic-Amp.