This is a set of props for Breaking the Sound Barrier, two decks, a dart, ribbon and some very degraded balloons and elastic bands. No instructions, R and S on the decks has stopped working, but could be redone. Probably more a collectors piece though. This could be a Harry Stanley model, but it may just be a well-made copy.
 
Instructions: None
 
Condition:
Decks are in good condition, though would need new R and S for performance, other props are in poor condition.