the most modern type of four axle saddle-bottomed wagon in the db is the four axle falns 121 with a loading volume of . it was built from 1992 in several batches. by february 2008 another 100 of these wagons were to have been delivered to the db and another 300 by 2010. these latest wagons will have an axle load of and an unladen weight of no more than , resulting in a load limit of .