Robert S. Butler posted:JimO'C here's a couple more boxcars from that series. What is interesting is that all of the boxcars have different home reporting marks.
In the photos you posted The International Transport Wagen has Hamburg - which was a major shipping hub.
The Banana Wagen has Bremen - which would make sense since Bananas would have been imported from overseas and Bremen did/does a lot of maritime trade.
The California Frucht Transport has Berlin - my guess for this would be the idea of luxury imports - expensive fruit from California. Berlin would have had enough people who could afford such luxuries.
Also this one from Munich