For those of you that don't know, railwhales were multi-axle tank cars! There were several hundred six and eight axle cars. In 1971 they were ruled to dangerous, but we're allowed to time out by the 40 year rule. My model represents one that hauled 43,000 gals of Ethylene glycol for DuPont to be used at their synthetic fiber plant. There were 70 of this number series.