Mullins trailer

The Mullins Trailer was developed by The (Mullins Metal Stamping Company 1894-1974), located in Salem, Ohio.
"The Mullins Manufacturing Company produced this trailer from 1936 to 1938. It was the only all-steel two-wheel auto trailer on the market at the time. Selling for $119.50, it was an immediate hit with the public." 
The name "Red Cap" came from the railway baggage porters of that time. They wore a red cap to stand out from the crowd at a busy train station. Automobiles did not have much of a trunk in those days, and suitcases had to be placed inside the car or on racks. This presented an opportunity for the sale of Mullins utility trailers.