Kromer's Famous Railroad Cap - Red/White/Blue Polka Dots At the turn of the 19th century, George Kromer, an engineer for the Chicago & NW Railroad, decided to design an alternative railroad cap with the help of his wife. They developed a rugged, double stitch constructed all cotton balloon top cap with an absorbent sweatband. This original Kromer cap is recognized throughout the world! Individually sized. Specify size when ordering. Limited Sizes Available.