Late 1970s SEPTA Map

I posted a photo of this map to my flickr account: the map itself is on the north wall of a pedestrian tunnel just past the old Penn Square subway entrance south of City Hall. I’m estimating it to the late 1970s. It is definitely older than 1984—the Center City Commuter Connection didn’t open until November 1984. In the map there are no rail or walking connections between Penn Center, also known as Suburban Station, and Reading Terminal, which was abandoned for the new Market East.
There are some notes on the regional rail lines in the description box of the photo’s flickr page, but I cannot read all the station names on the map. I hope to soon pass the map again and write down all the stops so I can solve the mystery of the forgotten routes.