It is highly unlikely that any sets of Jacks remain intact from those childhood years.
So, I went out to buy a set. Seems like there were twelve jacks in those long ago (for me) years. They also seem to have a different appearance.
Well, there are no complete sets from those past years here; however, there is one to use for comparison.
Do you see the difference? We had to be sure that all the jacks were off the floor when we were finished playing. They didn't feel good at all on bare feet! Ouch!