I do not know if this has been posted before, but BBC has some nice photos up of the New York subway 1905-30s ish.
http://www.bbc.com/travel/slideshow/20111013-the-early-days-of-the-new-york-city-subway
http://www.bbc.com/travel/slideshow/20111013-the-early-days-of-the-new-york-city-subway