SEPTA Broad Street Line B-I at Fern Rock, June 27, 2001 B-IV 330 at Fern Rock, June 27, 2001 B-IV 330 at Erie, June 23, 2001 B-IV 510 at Pattison, June 21, 2003 B-IV 535 at City Hall, June 21, 2003 B-IV 669 at Pattison, June 21, 2003 B-IV destination sign (interior view) B-IV interior Broad Street Subway signalhead