ARTINFO - John Lennon and Yoko Ono shown at their Montreal bed-in in 1969. A placard above Lennon's head is now valued at $70,000 and goes to auction next month.

John Lennon and Yoko Ono shown at their Montreal bed-in in 1969. A placard above

Lennon's head is now valued at $70,000 and goes to auction next month.

Photo by Martin Ujlaki, courtesy Flickr