The J&S cars were built with sheet metal "hoods" over the end platforms. As the D&RG rebuilt them, the first cars were rebuilt with duckbill roofs, the later with either full bull nose with ventilation or to "Faux" bull nose, without the ventilation and with the old roof line visible inside...
While writing the reports, we had the chance to take some siding off (among other things) to explore how the cars were built. I think that Billmeyer and Small had better car wall design than J&S, but the J&S roof framing was much better.
The D&RG was a very organized railroad, and by 1886 had developed its own standard passenger car designs, and then rebuilt the older cars in that image as work was needed. The 1886 design had the bull nose roof, double hung tall windows, and the standard truck, which would eventually receive the outside side bearing truck bolster. Car 292 got the bull nose roof, but its side walls were never rebuilt, so retains the arched top single hung windows... and with that its J&S interior.
Randy