Just like its name "Railroad Cap", It had manufactured for railroad workers in the past in 1920s to 1960s.
"Headlight" was name of brand which produced not only cap also every garments and gears for workers in Cincinnati, Ohio. (Images from google)
This one was re-maked by Toyo Enterprise in Japan which is same company has "Sugar Cane", "Sun Surf" and etc.
This is vintage Lee railroad cap that I bought it from Ebay. The seller says it was made in 1930s, or 1940s, but I do believe this one was made in more recently like 60s or 70s.
Vintage Lee one's "Amalgamated Clothing Workers of America" label.
I don't understand why Toyo one has chain stitches on this side. (even it has sewn in strange direction)
No matter what both of them are well-made hickory denim cap with reminiscence of the past.