A cap worn by Australia's greatest batsman Don Bradman will be auctioned in Sydney on Tuesday, with the tattered 'baggy green' expected to fetch as much as US$260,000.

Bradman donned the woollen cap during India's 1947-48 tour of Australia, which marked the touring side's first Tests on foreign soil after gaining independence. Auction house Bonhams said it was 'the only known baggy green' worn by Bradman during one of his most prolific series.