Mike-
I bet the JARTS legal team was quite busy during the 70's and 80's! I must say, I looked at the product packaging on your link, fully expecting to see dear old Mom with a JART sticking out of her cranium.
Your comparison of JARTS, and the modern aerial game
is worth considering. I say, put a safer balata tip on those old metal jarts and get em' back on the market!