Mr. Bouc compares one of the characters to the "Bismark" battleship. The Bismark was laid down in 1936 only, launched in 1939 and commissioned in 1940.
The locomotive looks like a BR standard class 5 with added smoke deflectors to make it look continental. These loco's were built in approx. 1953.
A few moments before the train hits the snowdrift it is seen moving across the screen from right to left surrounded by a landscape which, much as is it beautiful, doesn't at all correspond to the actual topography of that part of former Yugoslavia. The land there is predominantly fertile plains and there are most certainly no snowy mountains on the horizon to be seen.
Vinkovci and (Slavonski) Brod are not in Serbia, but Croatia (region Slavonia).
Greta Ohlsson's poor Swedish pronunciation reveals that the actress is not actually Swedish.
Much of the Hungarian spoken by the Andrényis is mispronounced or grammatically incorrect.