That makes it about 75+ years old. By the end of WW2 they only had 18 units. The end of the steam era on the PRR was around 1964 - 1965. I have just begun to list similar sets from a collector's hoard dating from the 1920's.
1951 Pennsylvania Railroad Rebuilt Freight Car Trains Industry Vintage Print Ad
PRR Annual Report 1951 Pennsylvania Railroad
1950 PENNSYLVANIA RAILROAD RR Advertising Passenger Train TIMETABLE Map Schedule
50s PENNSYLVANIA RAILROAD RR Advertising Train TIMETABLE Map Schedule Passes
Rare Antique PRR Pennsylvania Railroad RR Signal Lamp Lantern Co NY Hanging
Vintage 1953 The Pennsylvania Railroad RR Brake & Train Air Signal Instructions
