Sorry, Wrong NumberGoofs
Another contributor notes that the telephone next to Leona Stevenson's bed moves from her left side to her right side in a certain scene. Careful observers will note that in that certain scene the audience sees a REFLECTION of the scene in a large mirror, so it's only a illusion that the telephone "moves" to the other side of her.
Errors in geography
Another observer states that, early in the film, Waldo Evans has Henry Stevenson drop him off, on a rainy night, at a number 54 address but that, toward the end of the story, Waldo phones from an apartment with number 26 as the address. That observer considers this to be "an error of geography" but he or she fails to note that the early scene took place in Cicero, Illinois whereas the later scene took place after the thieving operation had moved to Bayonne, New Jersey and that Waldo was stating that he would be "at the Manhattan address." So there is no "error of geography."
Henry Stevenson is driving Waldo Evans home in his car on a rainy night. At the end of the car ride, Waldo tells him to stop at number 54. Towards the end of the film, when Waldo calls Mrs. Stevens to tip her off to her husband Henry's misdeeds, he says that he is now at his Manhattan address but will be leaving after midnight. His address number is visible over the glass window over his head, and the actual number is 26 read backwards. It could be the apartment number inside a building at 54, but the street name is never given.
Through the open window in Leona's bedroom we see frequent trains crossing Queensboro Bridge, and the existence of these trains is important because, on the phone, we hear the murderer telling a pal that he will wait till a train is crossing "in case her window is open and she should scream." The trains were a branch of the Second Avenue Elevated that crossed to Queens--but that service was discontinued in 1942. We could surmise that the action takes place before 1942, but the Chrysler convertible in which Henry gives Waldo Evans a lift is of a slightly later vintage (1946 at the earliest.) The movie was made in 1948 but the footage showing the trains on the bridge must be from an earlier filming.