Meet Me at Dawn (1947)

William Eythe is a professional duelist in fin-de-siecle Paris. If you want your wife's lover put out of action for a precise length of time, so you can win back her affections, he'll injure him with that in mind. It's a peculiar business model, but one that keeps him and his man-of-business Stanley Holloway in a comfortable, if erratic living. However, while work one job, he winds up rescuing Hazel Court from a wrecked roller-coaster. When she faints before giving him her address, he takes her home. She returns, the next day, to the wrath of her father, the newspaper baron.

Complications ensue, as they do in a comedy, and the players are up to the task, including some very reliable comic actors, including Margaret Rutherford, Basil Sydney and Wilfred Hyde-White. To add to the piquancy of this movie, they are all performing outside of the sort of roles in which they would soon be typecast, and acquitting themselves strongly. In all, it's an odd if pleasing romantic comedy.