Those vertical slat blinds behind the set also suggest a later time (wasn't it the 70's-80's when those caught on?
). The blue and white wires circling the room by the base board also suggest a later date (the blue makes me think cat5 LAN cable)...A 50's film set would not run visible base board wires unless it was 1-2' of Dumont power cord to an outlet or that distinctive 300 ohm antenna twin lead (and even that they would probably try to hide).