HO Scale - 60' PS-1 SD Boxcar - Rock Island #33943 -Description: Beginning in the 1960s, automakers approached rail carriers with the desire for larger freight cars to transport auto parts from suppliers to manufacturing centers. In response, the 60 auto parts boxcar was introduced. Carrying a wide variety of auto components including engine blocks, transmissions, brake drums, and others, these cars were a fixture throughout North America for the next four decades and can still be found in service