These models are a pair of HO Scale CTA 6000 series rapid transit cars.This set of shells represents the first 200 cars 6001-6200 built by the St. Louis Car Company for the newly formed Chicago Transit Authority starting in 1950. This listing represents these cars in their early configuration with dual dash-mounted headlights, flat-side doors, and the conductor's position inside the A car in the no. 2 end. This version includes trolley boards on the roof as well as a trolley catcher on the no. 2 ends of each car. This would represent cars 6123-6130.