As others have noted this is a one-joke comedy with the joke scarcely strong enough to carry the 90 mins. The movie is at its worst w hen it strains too hard to be funny with much pulling of flabbergasted faces and one ludicrous scene when the `note', obviously on a string, blows away and Peck dementedly chases it through the busy streets of Victorian London.
Gregory as the American Everyman excused from the English Class System looks and sounds fine if a little smug in a few scenes where possession of the eponymous note gives him the upper hand.
The big cast of British character actors including always enjoyable Joyce Grenfell as a dotty duchess in a slight variation on her usual jolly-hockey sticks character makes this fable on capitalism just about worth a look. Special mention also to A.E. Mathews striking just the right note as an antediluvian peer.
I found curious the billing of Ronald Squire and Wilfred Hyde-White, playing the brothers behind the scheme. They have exactly equal time at the beginning and end of the story but Squire is listed second with Hyde-White fifteenth! I'm sure Wilfred of My Fair Lady fame is the one remembered today.
Please note alternative title `Man with a Million'