My friend is doing a clinic on US military cars on German railways after WWII. He has models and photos of the 50’ USATC Long Flat (US Specs) but would like to find a dimensional drawing. I’ve searched the internet without success. He believes the 50’ Walther’s Trainline flat (http://www.walthers.com/exec/productinfo/931-1602) is similar. Any help in locating a dimensional drawing or more info on the Walther’s flat (prototype) would be greatly appreciated.