CSL experimental pre-PCC car 7001 is shown heading south on Clark Street at North Avenue, across the street from the Chicago Historical Society (now the Chicago History Museum). This picture was probably taken in the 1930s. 7001 went into service in 1934 and was repainted in 1941 before being retired around 1944. (Edward Frank, Jr. Photo)

CSL experimental pre-PCC car 7001 is shown heading south on Clark Street at North Avenue, across the street from the Chicago Historical Society (now the Chicago History Museum). This picture was probably taken in the 1930s. 7001 went into service in 1934 and was repainted in 1941 before being retired around 1944. (Edward Frank, Jr. Photo)