Half of the proceeds from the sale of the guitar will go to the Spirit Foundation, founded by Lennon's widow Yoko Ono. Read more about the guitar here.

The buyer, who wished to remain anonymous, almost broke the record for the sale of a guitar at auction, just short of the current $2.7 million record which was paid in 2005 for a guitar signed by Keith Richards, Eric Clapton, Paul McCartney amongst others.

In the same auction the iconic drum head which was part of The Beatles' set for their 1964 appearance on "The Ed Sullivan Show" sold for $2.1 million.