The best thing to do is find an Official Railway Equipment Register (ORER) that will cover the time you're interested in. It will tell you the classification of nearly every car. Jason
http://espee.railfan.net/aar_1989.html http://www.bnsf.com/EquipmentCharacteristics/js/ec/ECCarTypePage.html http://trn.trains.com/sitecore/cont...5/Freight car classifications.aspx?sc_lang=en http://www.greatnorthernempire.net/index2.htm?GNE_AARCarCodes.htm Gary