The No. 53 Rio Grande Snow Plow was created in 1957 when Lionel removed the front coupler from the Gas Vulcan Unit and replaced it with a plow. They produced this engine until 1960 with a BLACK body and writing on a YELLOW cab, 3-position E-unit and no interior light.
A production error caused Lionel to print the "a" in "Rio Grande" backwards on some of these units. The rarer B Variation has the "a" oriented properly. The window struts on this engine are often broken or missing altogether. This unit was only available for separate sale.