Sorry if the subject maybe was a little vague but I did not know how to word it for now..
I was wondering if there were ever any express trains roughly between 1920 and the 2000s (excluding wars and the berlin wall era) that had the same passenger carriages traveling between both countries thanks to truck exchanges enroute?
My story is a little funny - I had bought a like-new Sachsenmodelle wagon for cheap but it did not take me long to realize something looked a little weird about it, and eventually I realized I had bought not a German wagon but a Soviet one! However the body shell is built to the four feet gauge rather than five so it still looks okay behind the other DR carriages I have. So I may as well as keep the wagon around for infrequent uses once in a while just to have fun confusing people watching my layout but I was wondering if there was a prototype for this in real life nevertheless!