This steel transfer caboose was converted from a boxcar by the GTW’s Port Huron, Michigan shops in 1975. It eventually was obtained by the Association of American Railroads and used at their Chicago test facility. In 1996, it was donated to Mid-Continent along with Alco S-1 diesel locomotive #7 and moved to North Freedom.

In 2002 the museum leased the caboose to the Wisconsin & Southern Railroad (WSOR). It was repainted by WSOR to a yellow scheme and lettered as WSOR #X103 and was used at their Madison, Wisconsin terminal for work train service. In 2019 the caboose was returned to Mid-Continent.