A batch of unheard recordings made by Jimi Hendrix at his home in 1968 are expected to sell for $220,000 (£150,000) at auction.
The tape features 14 tracks including a Bob Dylan cover and "softer" versions of numbers from the rock legend's Electric Ladyland album.
It is believed Hendrix recorded it in New York but later gave it to Carl Niekirk, who worked in a photography studio below the Hey Joe hitmaker's London apartment.
Niekirk later sold the tape in a bar for a "nominal fee", and the current owners have put it up for auction after a long-running legal dispute with the administrators of Hendrix's estate.
The online sale, organised by pop memorabilia auctioneers Fame Bureau, will take place on Tuesday (28Apr09).
Fame Bureau managing director Ted Owen is adamant the tape is genuine: "It's pretty obvious. I have listened to nearly every outtake of Jimi Hendrix and am very familiar with the personal reels. Thirty seven are known to exist, but now only one is out there in the public domain.