Built in 1911, Pittsburgh Railways 4145 is a PN Jones designed heavyweight single end steel trolley car. This high floor car was built for services on the hillier routes of the system and was withdrawn from passenger service in 1940. It was then converted to a works car numbered M549 and remained in use for this purpose until 1968 when it was sold to the Magee Transportation Museum and restored back to passenger condition along with a regauging to standard gauge. Since then it has lived a fairly nomadic existence being auctioned off to the Trolleyville USA organisation in 1973, then sold at a further auction in 2006 to the Lake Shore Electric Railway before finally arriving at the Pennsylvania Trolley Museum in 2009. Since arrival there it has once again be regauged to the wide Pennsylvania Trolley gauge.