from the same family of Flyer freight cars...
#1118 Tank Car -- i'd love to get ahold of that font!
and a #1117 caboose. the 4-wh version was cataloged as number #1114.
this one is on the earlier Type II trucks.
a slightly later version featuring Type IV trucks & with added handrails and ladders sporting #1114 on one side...
and #1117 on the other side. i tend to call these blunders rather than errors.