Painting bought for $46 is worth $390,000

postcard-sized painting bought as part of a job lot at an auction for $46 (£30) and left hidden away in a drawer for a decade has been identified as work by John Constable worth more than $390,000 (£250,000).

Robin Darvell bought a cardboard box full of items including the small artwork -- which depicts a rural scene of trees, a bright blue sky and a meadow -- at a sale in Canterbury, southern England more than 10 years ago.

Only a faint signature on the back of its gold frame hinted at its origin. But when Darvell passed the painting on to his son Robert, Darvell junior decided to look into the painting's story, and find out who painted it.

Robert Darvell, 45, director of a film marketing company contacted fakes and forgeries expert Curtis Dowling from British TV show 'Treasure Detectives' who embarked on a year-long journey, analyzing the paint, canvas and signature to help solve the mystery.

The painting is now tucked away in a bank vault for safe-keeping. Darvell hopes to have it restored before talking to museums to put it on display to the public.

John Constable (1776 - 1837) was an English Romantic painter, famous for his landscapes of the English countryside, particularly scenes of his native Suffolk.

Last year, the Constable painting "The Lock" became one of the most expensive British paintings ever sold, fetching £22.4 million ($34.8 million) at an auction at Christie's in London.