American Bridge Builder Plate for the PRR

Another builder plate from my collection. American Bridge was another local to me builder. A rather large company! This particular plate consists of two pieces. Unlike the Penn Bridge plate, I know the provenance of this one. This 2 piece plate was installed on the turntable bridge located at the Pitcairn Enginehouse on the Pennsylvania Railroad. A former PRR/PC employee removed it when the removal of turntable was planned in the late 1970's.