Those 12 marbles are pretty cool. And although they aren't familiar to me, I'm not getting a CAC vibe from them either.
And FWIW, I still like to refer to size by the numbering system, even though I often don't since some find it confusing. It makes more sense to me to say a marble is a No. 3, for instance, since that covers marbles from 3/4"+ (e.g., 49/64") to 13/16 (52/64"). It almost seems silly to me to refer to marbles by 1/64" or even 1/32" increments, since I'm pretty sure the producers didn't have tight enough control over their processes to ensure such exact sizing of their production. If they did, they probably wouldn't have needed equipment to sort by size in the first place.
Does anyone know of a case where a size difference of less than 1/16" had a significant effect on the value of otherwise identical marbles (e.g., 37/64" vs 5/8" or 41/64" vs 11/16")?