Items which are displayed on sets - especially in 'older' TV series - things such as magazines, etc., were usually fake, so people watching at a later date wouldn't think it looked 'dated'. The magazines on display in the Hartley's living room - DFZ Magazine; Deutsche Friseur Zeitung (in English, it's known as European Haute Coiffure) was a real design magazine - about hair design, and the decor of hair salons, as well.
Ron Glass would soon become famous on Barney Miller, which was on the air but he would show up later.