Lovely little simplified network map that shows the SEPTA network in the mid-1970s, when commuter rail service was provided by the Reading Company and Penn Central… hence the two separate Chestnut Hill stations in the network (now denoted as East and West). Although the two systems are noted separately in the legend, there’s very little – if any – difference in the way they’re depicted on the map, although each line is labelled with its owner’s name in any case. Only interchange and terminus stations are labelled, but the map is only meant to give an overview of the network (the “big picture” if you will), so I don’t mind that so much.

Source: Trainweb.org website