That makes it about 75+ years old. The booklet is a soft cover 8"x9" book of 55 pages, folded in half for pocket convenience. By the end of WW2 they only had 18 units. The end of the steam era on the PRR was around 1964 - 1965.
1949 Pennsylvania Railroad Wall Calendar 30x30 Framed, Vintage Original
Rare Antique PRR Pennsylvania Railroad RR Signal Lamp Lantern Co NY Hanging
Antique Rare Adams & Westlake Pennsylvania Railroad RR PRR Oil Lantern PA USA
VTG Handlan Oil Lantern Pennsylvania Railroad RR Etched PRR Keystone K Globe USA
1950 PENNSYLVANIA RAILROAD RR Advertising Passenger Train TIMETABLE Map Schedule
1951 PENNSYLVANIA RAILROAD RR Advertising Passenger Train TIMETABLE Map Schedule