Picked up one of these at a flea market dirt cheap. Looking at it I see 2 dimples on both sides of the cab. I thought maybe a plaque of some kind was missing. Started looking at some Marx sites and eBay and it seems all of them, that I could find, had the dimples though I would swear that I had seen a few with something there. Maybe the CP version.
Does anyone know what these were for?
Frank