This western starring Barbara Stanwyck and Barry Sullivan features a prominent train robbery scene in the middle of the film. 

Early on we catch a nice shot of the train leaving the depot, led by popular movie engine Denver & Rio Grande #476. This one is still active in the fleet at Durango & Silverton NGRR. 

We get some nice shots of the train underway along the Animas River. 

The ever-popular Baggage #126 is the target again (now a concession car on D&SNGRR), as the 2 passenger coaches are cut loose. I believe the first (hero) car is Coach #306, which featured in several films and is now at the Colorado RR Museum. Although it is difficult to make out the # of the second coach, the most likely candidate would be Coach #320, which was basically a sister car to #306 for movie work (also at the CO RR Museum). 

The thieves get the loot and get away!