A lock of hair belonging to John Lennon is up for sale at a Dallas auction later this month and is currently bid up to $12,000. The lock was cut from Lennon’s hair by German hairdresser Klaus Baruck, just before filming began on comedy How I Won the War in September 1966.

John LennonA lock of John Lennon’s hair is up for auction in the US.

Heritage auctioneers in Dallas describes the lock of hair as ‘substantial’ and adds that the ‘overall length of the lock is approximately 4" and likely contains hundreds of strands’. It is believed to be the largest lock of Lennon's hair ever sold at auction and has been part of the original owner's collection for nearly 50 years.

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The haircut took place in September 1966, just a month after the release of The Beatles’ Revolver album and just before filming began on dark-comedy How I Won the War. Also included are two vintage period newspaper articles about the haircut, with one featuring a photo of Baruck cutting Lennon’s hair.

The auction will conclude on February 20th and also features many other items of Beatles memorabilia, including an LP of ‘Please Please Me’ and a mint-condition copy of the band’s Yesterday and Today album featuring the controversial "Butcher" cover.

More: John Lennon's Stolen Guitar Fetches $2.4m At Auction

In November a guitar stolen from Lennon sold for $2.4m at an auction in Beverley Hills. The Gibson acoustic, which was allegedly stolen from Lennon at a December 1963 Christmas concert, had been used on the recordings of ‘Love Me Do’ and ‘PS I Love You’.