A painting unknowingly bought by a woman at a flea market in the US for less than $50 has turned out to be a rare bargain — a work by French master Pierre—Auguste Renoir.

The painting by French impressionist is now set to be auctioned later this month and is expected to fetch USD 1,00,000.

It was bought by a woman as part of a box lot that included a doll and a plastic cow, and cost about $50, the BBC News reported.

A Renoir plaque on the frame prompted the woman to have it analysed by a local auction house.

She took it to a Virginia auction house where experts said they believed it was Renoir’s Paysage Bords de Seine — a river scene — from about 1879.

It is believed the painting was bought from a Paris gallery in 1926.

Pierre—Auguste Renoir (1841—1919) was a French artist who was a leading painter in the development of the Impressionist style.