Jimmy Page is auctioning off a guitar to help the children of Brazil.

Page is putting up for bids a Martin guitar he acquired in 2006, with the proceeds going to the Action for Brazilian Children Trust. The charity, for Brazil's poor and abandoned children, was founded in 1998 by his wife, Jimena Gomez-Paratcha. Page played the acoustic guitar at Roy Harper’s 70th birthday concert in London’s Royal Albert Hall on November 5th, 2011. The fingerboard is inlaid with Led Zeppelin and Zodiac symbols and Page’s name. It will come with a signed letter from Page and a color photo of him playing it.

Experts believe the guitar will sell for between $16,000 and $23,000 at the July 3rd auction in London.