UNION PACIFIC - #2267 This 70’ heavyweight mail baggage car is painted yellow with red stripes and grey roof and runs on 6-wheel passenger trucks. Built in the 1920s, this combination mail baggage car has a special compartment for Post Office use, with dedicated mail facilities for en-route sorting. The Union Pacific was originally incorporated in 1862 and by 1944 was one of the largest railroads in the world. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.