The Pignose amp, now known as the "Legendary 7-100", is a battery-powered, 5-watt portable guitar amplifier with one 5" speaker. It was invented by Richard Edlund [1] and Wayne Kimbell in 1969. The Pignose weighs five pounds and includes buttons for a guitar strap; it is considered the first portable electric guitar amplifier [2]. The 'legend' was established when the inventors gave 65 prototypes (with flexible rubber Pignose volume knobs) to some of the most famous musicians of the era, including Led Zeppelin [3], The Rolling Stones[4], The Beatles [5], The Eagles [6], and The Who [7]. Terry Kath (of Chicago), was given one which led to a partnership with the group and its management team in 1972. The first production Pignose amps debuted at the '73 NAMM Convention in Chicago.