Two pretty useless cars that came in my first set of trains back in the early 60’s... still have the cars for sentimental purposes, but would never run them!!! (Not my pictures)
The target car sides would rattle loose when running at anything higher than a crawl (not an easy feat with post war engines) even with the pin inserted, and despite the commercials of the day, hitting the target from one of the missile cars is next to impossible.