A cap worn by Australian cricket legend Sir Donald Bradman is expected to fetch up to £200,000 when it goes up for auction next month.
Bradman wore the cap - known as a 'baggy green' - in the 1947-48 home Test series against India, during which he scored his 100th first-class century.
Bradman, who died aged 92 in 2001, is widely regarded as cricket's greatest-ever batter, averaging 99.4 runs per Test innings.
The cap has been on loan since 2010 to the Bradman Museum in the player’s hometown of Bowral.
Following the 1947-48 Indian tour, Bradman gave the cap to the Indian team tour manager, Pankaj Gupta, who passed it on to the Indian team's wicket keeper PK Sen.
It was purchased by the current owner in 2003, auction house Bonhams said.
"The baggy green has been part of cricket and sporting heritage for decades," explained Alex Clark, a senior specialist at Bonhams.
"This very special baggy green promises to have real appeal to followers of cricket and sport generally, and anyone with a keen interest in the history of sport."
It will go on sale at Bonhams Sydney on 3 December.