|    Introduced 
                          by Pullman in the mid-1960s, the PS-4427 low side covered 
                          hopper became the backbone car for many of the large 
                          grain hauling railroads as well as the car of choice 
                          for many leasing companies. The 4427 also was used to 
                          haul malt and sand products, which increased their venerability. 
                          Many of these hoppers wore colorful, diverse schemes, 
                          which featured large logos or lettering. Some of these 
                          cars still exist in service today. |