Is that crusty-looking stuff around base of the nub stone or does it look like dried adhesive? I wonder if that was a decorative knob or something similar, and if that little ridge at the base of the nub was there to hold glue, since it doesn't impress me as a very good marble for play - just doesn't seem like it would roll very well.
That's a really good question, Tommy. Truck loads of marbles were used constructing the place. Maybe they just dumped them in the lake and let the kids find them as they washed up on the beach or maybe they're now entombed in the concrete of Navy Pier.
Chad'll be looking a good long time to find Waldo in this pic. lol
And I'll give you a hint . . . huge arched windows full of marbles! If I saw that place as a kid, I probably wouldn't have been able to control myself. Can you imagine how awesome that must have been, especially if you were 3-4 ft tall? Wow!
You know, I do see what Ron saw on that first one - it does look like it could be an odd Vitro with weak colors. But I am going with foreign on all of the marbles here, other than the first Vitro and the MK.
I'm pretty sure that Charlie Stutsman (RIP), who named and sold a lot of these NOFs in the 1990s would have referred to 6 of those as "Tangerine Slags" - you've got a nice variety of that type.
Given the two-patch structure, rather than patch and ribbons, I would say that MK is the newer style. And that first marble is pretty cool - kinda messy, but cool, for sure.
I'm getting a Vitro vibe from the first one, but it'd be a bit of an oddball - maybe a cosmic rainbow??? The second looks foreign to me and the third does look MK.
It sort of looks like there might be two ribbons running together on one side of the first marble - like maybe one under the other. Weird stuff like that happens on Pelts some times.