Factual error: In the Bosphorus scenes, as the ferry crosses from the Asian to the European side of Istanbul, in the distance large trucks can be seen speeding along the coastal road opposite. Well before their time.
Factual error: The same locomotive is used for the entire run of the train, from Istanbul to northern Yugoslavia. This is impossible - locomotives would have been changed at the Greek, Bulgarian, and Yugoslav borders, at Belgrade, and perhaps at Nice.
Factual error: The Locomotive pushing the snowplow close to the end of the movie is a French 141 R. They entered service from 1945 on, ten years after the movie is set.