Great work so far.
As Rich said, be ever so careful with the tuning dial. Personally, I would remove it, clean the front with a rag lightly moistened with foaming cleanser, and do nothing to the screenprinted reverse except lightly dust it with a very soft brush.
Some people replace the speaker fabric with new, but unless it's too bad, you're probably best leaving it as-is, keeping the set nice and authentic.
Where to go to see old radios? Definitely the late Gerry Well's wireless museum in Dulwich, London. Have a look at the "Virtual Tour" here:
http://bvwm.org.uk/