When did Fender produces their first guitar amp?
Fender amplifier
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.  By mid-1961, after this short-lived look, Fender was using the darker brown tolex which was a mainstay for many of the mid-1961 to 1963 amps. Between 1961 and 1963, there were three different grillcloth colors: wheat, brown, and maroon and many tolex-grille color combinations are found suggesting that Fender was not reluctant to use up whatever stocks of materials were on hand.