[streetmechanic]

Sometime in its past my 16B either took a hit on its tuning knob or somebody clumsily tried to disable its fine tuning function.
One of the metal tabs at the back of the assembly was bent badly enough to release the smaller (7/64) bearing balls. I found 
four of them but I have two questions: (a)were four bearing balls all it ever had and (b)where do the balls go; or more
specifically,  what acts as the outer bearing race? I'm guessing Philco never published an exploded view of this but a good
photo of an undamaged assembly would probably tell me what I need to know.
-Dave