The auction house will sell the tapes - from the collection of audio engineer Ron Nevison - as part of its Marvels Of Modern Music auction, which runs March 13 - 20.

Led Zeppelin recorded the "Physical Graffiti" tracks in the Ronnie Lane Mobile Studio that Nevison designed in an Airstream trailer. "Nevison's Physical Graffiti tapes provide a window into the creative process behind one the greatest albums ever produced," says RR Auction VP Bobby Livingston. "An absolutely remarkable piece of modern music history."