Pennsylvania Railroad Pair of Northern Express Passenger Train Departure Signs - North Philadelphia Pennsylvania Railroad Pair of Northern Express Passenger Train Departure Signs - North Philadelphia. Both are plexiglas sign with black background, etched with clear lettering from the reverse. Reads, " To Buffalo Northern Exp. No. 39-575 LV. 9:49 P.M. No. Phila." The second sign reads " To Buffalo Northern Exp. No. 3-575 LV. 9:24 P.M. No. Phila." Signs measures 16 3/4" x 6 1/2". Signs show minor wear and faint scuffs. No chips or cracks.