When did Fender produces their first guitar amp?
Fender amplifier
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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.