I'm almost sure this is a 30s movie. Black and white, pre WWII. Gary Cooper is a yank who is without funds and two men bet that if they give him a million pound note, everyone will think he's rich and he won't have to spend a dime. Everyone will treat him. The writer of Trading Places may have watched this one. I just need the name of the movie. I have looked at his filmography and can't find it. It isn't If I Had A Million - another good movie, but not the one I'm looking for.
Any help greatly appreciated.:)

The Million Pound Note (1954) with Gregory Peck.

Thank you so much. No wonder I couldn't find it - I had the wrong actor.

You're welcome.