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A porcelain teapot produced by English potter John Bartlam which sold for £575,000 in 2017.
The broken pot, missing its lid, was produced by John Bartlam, a British potter who took his trade across the Atlantic to America in the mid-18th century.
A tea bowl and saucer which were bought on eBay for £1,000 could sell at auction for 100 times that amount.
The savvy collector took a punt on the items as he believed they could have been made by trailblazing English potter John Bartlam.
Bartlam, who was originally was Staffordshire, was responsible for the first pieces of porcelain fashioned in America 250 years ago.
Scientific tests have proved the tea bowl and saucer were made at Bartlam's factory in Cain Hoy, South Carolina between 1765 and 1769.