Most of these cars were constructed by Colorado Railcar Company of Fort Lupton, Colorado. Some early versions were built by Tillamook Railcar of Tillamook, Oregon, which operated out of an old U.S. Navy airship hangar at the Tillamook Airport. The owner of Tillamook Railcar later went on to form Colorado Railcar. These early versions were reconstructed from retired commuter "gallery" cars. More recent ones were built new, and several of these are longer and taller than the classic passenger car design.