Mark Heiden asked, "According to the PS-1 40ft Box Car List on the Steam Era Freight Cars website, the cars Chesapeake & Ohio cars in series CO 16000-16999 had both Apex and Gypsum running boards. Does anyone know the breakdown of each by car numbers?"
Mark, according to the C&O Freight Car Diagram dated March 3, 1951,
- cars 16000 through 16749: Apex
- cars 16750 through 16999: Gypsum
Hope that helps!
Steve Busch, Duncan, SC