Builders discovered a stash of 239 gold coins at a manor in northwestern France which could earn up to 300,000 euros ($356,490) at auction later this month.The three craftsmen found the treasure while working on the restoration of a house in Plozévet, Brittany, in the coastal area of Bigouden in 2019, according to a press release from auctioneers Deloys ahead of the sale. The property had been purchased by a couple in 2012.