It's not an original picture, but a remake of an Argentinian film called Nueve Reinas (Nine Queens). In the original, a pair of con men attempt to sell a sheet of (nine) counterfeit stamps. In this version, it's a very old "silver certificate". They're both good, but I like the American version better mostly because of John C. Reilly. It's a movie about con men and an elaborate con, so I'll try to keep from spoiling too much, but don't worry about the item. It's a macguffin for the plot and characters to revolve around.