Princess Diana's iconic 'black sheep' sweater to be auctioned for over $50,000

A red sweater worn by Princess Diana featuring a black sheep pattern will be auctioned.
Diana wore the sweater in 1981 shortly after her engagement to Prince Charles.
The original sweater was damaged so designers Sally Muir and Joanna Osborne made a replacement.
The damaged original sweater was recently rediscovered and will be displayed at Sotheby's before auction.
The auction estimate for the sweater is between $50,000 to $80,000.