Experts hope to work out if an LS Lowry painting expected to raise up to £500,000 at auction shows a favourite north Wales summer holiday resort.
Lowry spent many childhood summer holidays visiting Rhyl
Beach and Promenade is one of six works to go under the hammer at Christie's in London in June.
Lowry, from Salford, spent many childhood summer holidays at Rhyl in Denbighshire.
Christie's spokesman Matthew Paton said: "It may be that we'll manage to work out if it is a painting of Rhyl."
He added: "It could be difficult to be precise about where it is. He often did composite images.
"We think it could be Rhyl or Lytham St. Anne's, where he used to go a child."
One feature which could hold a clue to the painting's location is a distinctive mill-like red brick building.
It is more reminiscent of his industrial scenes, and is sited in the middle of the promenade.
The six paintings have been put on the market by a private owner and are expected to collectively go for £3m.
Laurence Stephen Lowry (1887- 1976) is best known for his matchstick men and industrial landscapes, based largely on Manchester and Salford.