The prototype of the car was built by the Greenville Steel Car Company for the Southern Railway from 7/1975-1/1976 (Series 66090-66799) This HO Scale 1:87 Greenville 52'6" Gondola STL files comes with the body, A and B platforms, brake wheel and coupler box covers. The only thing that you need to complete this model is some 100-ton rolling bearing trucks with 33' metal wheels and metal couplers of your choice. Also you need 2-56 x 1/4 phillips pan head screws for the trucks and 2-56 x 1/8 phillips pan head screws coupler boxes.