As a follow-up, I model c-1955 so I have a detailed NYS&W freight roster for that time period (1954-1958) with notes. The notes indicate that Suzy Q originally had 500 Fowler box cars listed as manufactured by Fowler Car Co. of Canada (could be a mistake). I have notes on the other boxcars that I thought you might find interesting, so I have uploaded the roster to the files here.