When Nurse Ratched came to see Edmond the first time, she used a key on the outside locked bars. When she was leaving Edmond after bringing him the soap, she called out "gate" and it was buzzed open by an unknown guard.
Dr. Hanover mentions getting cadavers from the "Oakland County morgue. There is no Oakland County in California.
The Tabasco sauce on the table at the restaurant is in a modern bottle with Nutritional Information on the label.
The viewfinder (model E) that can be seen in one scene was not made until 1955.
Nurse Ratched asks Nurse Bucket how a person could write their name on a peach. Nurse Bucket suggests a "felt tip" pen, which was not in usage in the US until the mid 1950s.