A brightly coloured pottery plate bought at a charity shop in Hampshire for £1 was sold at auction for £1,760.
A collector's club was set up after Poole Pottery changed hands
When Sandra Buckland, from Swanage in Dorset, bought the 1960s plate three years ago she did not realise it was from the world-famous Poole Pottery.
It was packed in a box in her loft and she only discovered its value after looking through a book on collectables.
On Saturday it was sold to an anonymous buyer for £1,760 at an auction house in Wareham.
John Condie, an auctioneer at Cottes Auctions, said: "She was over the moon.
"She couldn't contain her excitement and was telling everyone around her that she had bought it for £1 and couldn't believe what it was selling for."
Mr Condie said prices for works from Poole Pottery have rocketed since the company changed hands in December last year.
He said: "There has been a new collectors' club and we have certainly had more people at the sale than we did this time last year because a lot of people want to buy it."