History:  From 1911 thru 1917, 70 ton H21a "quad" hoppers were introduced for coal service. During 1922 and 1923 all early H21 hoppers were converted to H21a's by replacing the 50 ton trucks with 70 ton trucks equipping them for coal service and bringing the total to 36,000 H21a hopper cars. The original 1909 thru 1930 quad hoppers were built with the "old style" double door hopper. During the 1930's and early 1940's all old style double-door hoppers were replaced with the "saw tooth" hopper, increasing capacity by 39 to 40 cubic feet making them easier to maintain.

Listing of Available Models and Associated Car Numbers:  The list below identifies the cars and roadnames that are currently available.  Underlined part numbers have pictures available for you to see on-line by clicking on part number.  Please note that each production run of a roadname uses a new series of car numbers.  We do not re-use a previous numbering series for any subsequent production run.  Thus, we only can fill orders for the most current production run and associated numbering series.  
Please refer to our list of H21a Hopper car numbers that have be used and the current numbers which are available.