Thankyou all for your response...that would explain the 'baggage-like' doors on the car. My next question is, does anyone know when CN railway dropped these cars from passenger service? '60's? 70's? ???
According to a book I have, now out of print-" Moving Mail and Express by Rail ", the very last day of the RPO's was in September and October of 1967. Of note..The RPO did not operate in Canada.