A placard reading "Bed Peace", which was made by former BeatleJohn Lennon during his peace-in with wife Yoko Ono at a Canadian hotel, has fetched almost £100,000 at a London auction.
The sign, sold at Christie's auction house on Tuesday, was bought by an anonymous telephone bidder for £97,250 ($153,835, 113,670 euros).
The iconic singer-songwriter made the placard in 1969 during his second week-long bed-in to protest the Vietnam War.
The demonstration took place in Montreal's Queen Elizabeth Hoteland followed an earlier event during the couple's honeymoon in Amsterdam.
Christie's director Neil Roberts said: "We are thrilled with the results of the Rock and Pop Memorabilia sale which was led by pieces relating to important moments in the development of The Beatles."
Another bidder paid £34,850 for a letter written by fellow Beatle Paul McCartney, offering an audition for the role of drummer in the band.