Philadelphia Suburban Transportation Company 66 is a heavyweight centre entrance steel interurban car built by JG Brill in 1926 for the Philadelphia and West Chester. It became PSTC 66 on 19th December 1935 as a result of corporate reorganisation and then a further change of ownership came on 29th January 1970 with it moving to the Southeastern Pennsylvania Transportation Authority - once again retaining the number 66. It was acquired for preservation by the Pennsylvania Trolley Museum in 1970 and re-entered service in 1975. The museum also acquired idential car 73 in 1990 and it is planned to also restore this to enable them to operate it in a two car train.