A Railroad engineer cap is a cotton ticking front-brimmed cap similar to the fatigue cap worn by the USMC, the upper part in a single piece of fabric folded and pleated to the band.
A Railroad engineer cap is a cotton ticking front-brimmed cap similar to the fatigue cap once worn by the US Army, and the utility cover worn by the USMC. The upper part in a single piece of fabric folded and pleated, usually loosely, to the band.