George Martin and the Beatles recording Sgt. Pepper

George Harrison and George Martin working on Sgt. Pepper, 1967. 

George Harrison and George Martin working on Sgt. Pepper, 1967. 

George Martin working on Sgt. Pepper, 1967. 

George Martin working on Sgt. Pepper, 1967. 

John Lennon, Paul McCartney and George Martin working on Sgt. Pepper, 1967. 

John Lennon, Paul McCartney and George Martin working on Sgt. Pepper, 1967. 

John Lennon and Mal Evans at a Sgt. Pepper session, 1967. 

John Lennon and Mal Evans at a Sgt. Pepper session, 1967.