PRR itself was pioneering steel passenger cars, which the public soon demanded for the implied increases in safety.

[citation needed] By 1940, most railroads had forgotten about the 4-4-0, but PRR , Boston & Maine and Canadian Pacific Railway, were still using them.

1035, 1223 and 5079 were all leased to the Baltimore, Chesapeake & Atlantic Railway working such routes as the McDaniel Branch and the Love Point to Easton line.

1223 was retired from revenue service in 1950, For years, the engine was stored at a roundhouse in Northumberland, Pennsylvania.

The locomotive spent most of the 1980s pulling Strasburg's half hour trains but also made appearances at special events such as the 85th anniversary of the Broadway Limited in 1987, and an off-property trip to Delaware for Dupont in 1988.

1223 made its last run on October 26, 1989, after which, Strasburg's newly acquired ultrasound device revealed that the firebox walls of both No.

7002 were not thick enough to comply with the updated Federal Railroad Administration regulations, thus deeming the engines unsafe for operation.

After retirement from excursion service on the SRC, 1223 and 7002 have remained on indoor static display in the Railroad Museum of Pennsylvania's exhibit hall.