I knew the history and all that at one point, but I have forgotten. The first ACC folded horns were Altec or Cerwin Vega or something. I don't remember, but I know that my 360 is one of the first few made, and it has its original driver. Mine has been reconed. Most of them got replaced because they failed. They then went from whatever it was they were using to a different driver. I only think they made a hundred or so with the driver that didn't work that well. Maybe less. And, since I believe the driver in my amp is original even if reconed, it makes me a little nervous. But, I'm not filling a stadium. I just occasionally puree innards in bars. It does that very well. When the bass pumps out of a folded horn, you dance or you die. It's power baby!
The first ACC amp I ever got was the first serious amp I ever got. It was a 126 combo, and I still have it. It lives at a drummer's house in his basement where that band rehearses. Eventually, when the pandemic is over, I might see it again.