Fuel Supply Co hopper
More goodies from the Barriger Library, FSCX 156:
These pics show a 1920s ACF variation on the 1905 Common Design hopper: flush end sills and a outward-facing angle at the bottom of the side. BC&G 1601-1900 are the earliest examples I know of.
FSCX 120-494 became VGN H-7 3300-3670 in 1936.