I'm 100% on the side of Peltier.
The same chemical reaction which MFC and Akro used on purpose to create oxblood could create oxblood by accident in other makers when the right chemical colorants were present.
Wow! Heavy.
I was talking with a friend about $2 bills on Monday.
Lots of pretty marbles. I'm intrigued by the earth tone one to the left of the popeye near the top but that's not the only one that stands out.
Pretty sure it's a modern marble. I think a machine-made marble from Mexico. The company I have in mind was once called Vacor de Mexico, so we usually call the marbles Vacors.
With that shade I think a very good chance of being modern. But the white isn't the texture or shape that I'd look for for Vacor, so maybe Champion? I don't know.
I'll move it to the ID forum.
Keep entertaining us!
Jabo on the yellow set.
In the purple group, I think Christensen Agate slag on the bottom middle. Maybe also vintage slags on left and right -- but not sure if I'm seeing any helpful details to make a guess on maker. The top two seem to have a different shade? I'm not getting any feel for age there -- considering modern.