The boxing gloves worn by Muhammad Ali when he beat Joe Bugner for the world heavyweight championship in 1975 are expected to fetch up to £60,000 at auction.
The signed 10oz red Winning S.S FP-800, Tokyo, gloves - which are described by auctioneer Graham Budd as "hugely important" - still have the original lacing.
Ahead of the May 15 sale at Sotheby's in London, Mr Budd said: "Any fight-worn gloves by the great man are highly desirable and there have been spectacular prices at auction for similar items.
"In our last auction we sold Ali's trunks that he wore against Henry Cooper at Wembley in 1963 for £70,000."
The inside wrist of the right-hand glove has been signed in ink by Ali.
Bugner has written K.L., 1.7.75 on the outside which notes the day after the fight in Kuala Lumpur.
The left-hand glove has also been signed and marked with the number 75 by Ali.
The gloves had been part of the private collection of showbiz promoter Robert Paterson, who had brought Ali over to England in 1966 to defend his heavyweight title against Henry Cooper.
Mr Paterson later gave them as a gift to his mother's godson in 1982.
They are also being sold with a signed letter of provenance from the present seller.