A Scarborough family have spoken of their shock and delight at finding out family heirloom was worth £30,000-£35,000.
Sophie Edwards, of East Ayton, took a number of items to the Antiques Roadshow, which was filmed at the Spa earlier this year.
But the one which outshone the rest was a buli buli - a war club from Fiji dating back to the 18th or early 19th century.
The club had been passed down to her dad John by his father, but the family did not know much more about it than that.
Sophie’s mum Jenny said: “We had no idea that it would be that valuable at all!
“We just wanted to find out more about it, as sadly we can’t trace back its provenance.”
She added: “We’d always liked it. It’s beautifully carved and very interesting to look at.”
Mrs Edwards explained that Sophie, 29, had gone to the Spa with the object in a bin liner and that when she returned with the verdict, their jaws dropped.
She said: “It’s one of those things you see happen to other people on the Antiques Roadshow.
“You never really think it will happen to you.”
Sophie, who went to the show with her friend Gemma Johnson, was told by expert Ronnie Archer Morgan that the buli buli was not just a weapon of war, but a prestige object and a status symbol.
He added that he had never seen one as good as this before and that “with an unbelievable object comes an unbelievable price”.
Mrs Edwards said that since the programme was on, they have had a great reaction from friends and relatives.
She added: “Lots of people have said how good Sophie was!”
Sophie missed the show being screened as she is currently teaching English in Hanoi, Vietnam.
But the family made sure someone was recording it, so she can see it on her return.
Mrs Edwards said that they have decided to sell the club and that it is currently with a dealer, who is speaking to collectors as far afield as New York.
There are also ongoing discussions about the price, as opinions have been varied.