Greetings,
Branson Scenic Railway in Branson Missouri has three Burlington Dome cars that are used daily on trips in SW Mo. I know they have a website, but I don't have it handy. Filmed from the right angle it would be hard to tell the era in which they were filmed. They are still lettered for Burlington. I rode in Silver Garden.
Hope that helps,
Bob
Modeling in N scale: Rock Island freight and passenger, with a touch of the following; Wabash Cannon Ball, CB&Q passenger, and ATSF freight and passenger. I played in Peoria (Heights).