Christie's says he gave the handwritten lyrics to then 16-year-old Gail Renard - now a comedy writer for British television - during the eight-day Bed-in with Lennon and Yoko Ono at the Queens Elizabeth Hotel in Montreal.
Lennon penned the lyrics and recorded the song in the hotel room with about 50 guests, who included singer Petula Clark and beat poet Allen Ginsberg.
The song is expected to bring $400,000 to $600,000 at the July 10 London auction.
