Sydney suburban & city underground railway map diagram - 1939
The actual diagram is even closer to the 1933 Beck design of the London tube diagram - helped by the presence of many London names such as Lewisham and Stanmore (as well as some very non-London names as well). Two names stand out - Epping - this would have to wait a decade to appear on the London diagram - & Ashfield. No station of that name in London but it was the name of the then chairman of LT.
At this date the Sydney suburban lines were under going a vast programme of electrication as noted on this map.