These cars reached the end of their revenue service lives in 1991 since they were built in 1951. Many were pushed into MOW service, received new 5 digit numbers painted on yellow ends (panels 1 to 4) and continued to serve Conrail in that capacity for many years. I have also seen these cars with their revenue service numbers performing MOW late into the 90's. I would pick up all five numbers and load them up with ties. Thanks.
Jeff