When it comes to why 50 for an Alley and 5 for a Jabo I say it is because the Jabos were made as collectibles for collectors. Exactly the same reason the mint Morgan can be 5000 and the Franklin Mint coin 50. no difference at all IMO. As for the Alley and CAC difference I believe it is Eye appeal and rarity more so than a name. I have looked through 10s of thouasands of marble in collections out here in CA and it is extremely rare to find even a common CAC swirl. Much less common than even Pelt NLRs. As for Alley Agates thousands upon thousands. I have to disagree it is a just a name thing. I went through thousands and thousands of Bert Cohens machine made marbles after he passed. I do not remember even finding one half way decent CAC, But I found thousands of new run Jabos and Alley Agates, just sayin