Coal Hopper Car Set. 2 Royal Bavarian State Railways (K.Bay.Sts.B.) type OOt coal hopper cars, built starting in 1903. Era I, cars come loaded with real scale size coal, cars have different car numbers, cars come with brakeman's cabs, separately applied hand wheels. load surface in different color, finely detailed reproduction of the arch bar trucks, double spoked wheels, cars have close coupler mechanism and NEM coupler pockets. Total set length 316 mm (12-5/16").