The Fender Bandmaster Reverb was an amplifier made by Fender, essentially a Silverface Bandmaster piggyback head with built-in reverb and vibrato. It was introduced in 1968 and was discontinued in 1980. Master volume models with "pull boost" tone circuit and a Mid control knob for the Normal channel were introduced during the "tailless" amp decal period in the mid-1970s. [1]