A demo tape by Radiohead featuring unheard tracks, which suggest the band's "fantastic potential", is going under the hammer later this month.
The cassette, which was recorded when the group was called On A Friday, features six tracks, three of which have not been heard before,
The unheard tracks are Promise Me, Boy In A Box and These Chains, auctioneers say.
Handwritten notes and a label design by frontman Thom Yorke are included in the cassette, which is expected to fetch £2,000.
Members of the band met at Abingdon School in Oxfordshire and took their name from the day of the week when they rehearsed.
It is thought the tracks were recorded after the band left school but before they signed to EMI Records and changed their name to Radiohead in 1991.
They later became acclaimed for tracks such as Paranoid Android, Creep and Karma Police.
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The seller of the cassette, who wants to remain anonymous, knew the band in the early 1990s and was given the tape by a member of the group.
Auctioneer Paul Fairweather said: "The tracks are raw but certainly suggest something of the fantastic potential that the band would realise in a few years' time."
The cassette is part of the online punk and indie auction on 26 January at Omega Auctions.