The TV station repeatedly shown in the movie has the call letters "KPXA." However, being in New York the call letters should begin with a "W" as stations east of the Mississippi River begin the letter "W" and not "K".
When Chaplin's title character first meets the boy Rupert, the boy goes into an extended diatribe. Numerous times in the scene, the boy can be observed silently saying Chaplin's lines as well as his own, presumably as a way of remembering his cue.
In the last scene with Shahdov and Jaume, image is reversed as one can see by the reverse writing above the emergency exit sign above them and their jacket pockets with handkerchiefs and flower lapels are on their right side.