Car was used to repair overhead trolley wires; originally refrigerator car of United Railways, then to St. Louis Public Service Co. Home-built line car, 41' long by 7'3" wide, 4'8.5" gauge, runs on 600VDC; K12 controller with four WH 56 motors, 200 HP total; straight air brakes. United Railways in 1900; United Railways refrigerator car "Z" (1902-1913); United Railways #77 (1913-1927); St. Louis Public Service #77 (1927-1963); Bi-State Development Agency #77 (1963-1966). Donated by Bi-State Development Agency in 1966.