How about some really old Nostalgia - these are from the Manhattan Elevated before electrification:
img217 by Jim P Photography, on Flickr
img216 by Jim P Photography, on Flickr
These pictures are from a small collection of IRT material I recently acquired and scanned. Here is a list and links for those interested:
http://bmt-lines.com/2011/04/irt-historic-material-posted-on-scribd/