Defense Special Trains 1941

They were special Red, White & Blue painted trains that visited manufacturers across the U.S. in 1941 to encourage and locate war suppliers and help with war build up .
Thanks to C Buss for bringing it to my attention. She says "My father, George k. Culbertson, was with the signal corps display on the Defense Special Train going west in 1941, starting in Washington, D.C., and stopping in Denver, Seattle, Spokane, Los Angeles, San Diego, San Antonio

This is what I found about it so far and would love to know more !

Defense Special Train Articles

War Mobilization and the Use of Small Manufacturers