It's been IDed as a Jabo before, but so has the Alley. I posted them together the first time. That's when I first heard the immortal phrase, "Buttcracks don't lie".
Then I posted the pistachio in a different thread and got a Cairo ID because of the little eye in back. It is an Alley though. Slam dunk. The dug Pennsboros Ron sent nailed it solidly.
I think this one is a Cairo though.
Two days ago I was leaning uncertainly toward Champion. Then last night I saw something last night in a pic from Alan's site which made me think "maybe Cairo". So that pointed me to the Cairo section of AMMM and got me looking closer than I had before. Got me looking closely into the case on p. 57. And I think I might see a match for my marble. The pic is dark, and the marbles are small, so it doesn't stand out. But I think it could be a match.
Even if that particular one isn't a match, it has strong similarities. I'm seeing more similarities in the Cairos than I've seen in anywhere else.
Here is the Cairo I saw last night. It came from Alan's old site. The colors don't seem to blend as much in mine as they do here but I think the shades are similar. I still don't know where mine is, so I can't doublecheck, but I think it's very close.
If you have AMMM and want to check that case on p. 57, the marble which I think looks like mine is about one-third of the way from the right edge and a little more than half of the way from the top.