Mine is a 1971 Solex made in France. It gets 65-85 miles/qt. depending on the terrain, wind, and my weight. 😄
It's a total blast to ride - one of my favorite things to do.
I don't think the first is a JABO. It'd be nice to see a few more photos of it not buried in the hole, so you can see the marble. 🙂 The second does look like a JABO to me and the third one may be too, although it might be a Champion. The last one is a newer Marble King.
Gotta say, Rick, that was about 30 years ago. I still ride the same bike, occasionally, and I could probably still finish the course today - might take me two days though. lol