Hi,
As I recall confirming what you say, was a total of ten (10). The follow up hoppers had the slope sheet end farther down on the sides - not up in the corners. I think this group of 10 were the only hoppers with arch bar trucks. I was intending on building a few for live steam (2.5" scale 7.5" gauge) but other things happened. They would have made great ballast cars.
Doug vV
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