Operating Redbirds

I don't know much about NYCTA, but I just saw this vid at Youtube - it's the IRM trolley festival. Most are Chicago-based cars, but at about 9:00 there's a set of redbirds cruising by under trolley poles.

http://www.youtube.com/watch?v=iqIQrDBJgjM

Those are R28s 7926-27, built by ACF 1960.