Police are warning the public to look out for a man trying to swap watches for cash after claiming to need fuel for his car.
The man, who police think is Italian, was seen driving a white Ford Fiesta in Bourne and Market Deeping where he has been stopping people to ask for directions to London Stansted Airport.
He then goes on to claim that he has no petrol in his car to get there and offers to exchanges a watch for money to fill up.
Anyone with information should call 101.