Les Paul Greeny.(duda).

https://en.wikipedia.org/wiki/Greeny_(guitar) escribió:

Green attempted to emulate Eric Clapton's tone by removing the neck pickup. Eventually it was put back in, but backwards by mistake.[11] This gave the guitar its "distinctly nasal" out-of-phase tone when the pickup selector switch is in the middle position. Kirk Hammett described it as sounding like "a Strat through a 100-watt Marshall stack".[4] The neck pickup also features a flipped alnico magnet, thought to be a factory error or an aftermarket modification.[12] The guitar's neck has been broken twice, which Hammett feels has also affected its tone.[13] Peter Green, however, felt that there was nothing particularly special about the guitar or his sound. He also stated that he didn't know what "out-of-phase" even meant.[11]