Quick technical note: Akro wasn't producing marbles in 1910. When Akro started business they bought marbles from MFC. Their special gimmick was how they marketed the marbles. Akro put them in prepackaged sets of 5 with the Akro brand. This was a new thing. Akro started making marbles in 1914.
I've only had one ballot box. It had black and white bennington style marbles.
There were handmade ones in glass, with pontils, like mellonballs.
I have that ballot box book. Might be a good day to finally read it all the way through. p.s., it mentions lots of different kind of ballot balls. Even cubical ones. Materials included wood, rubber, composition, and more.
Here's a pic of ceramic ballot marbles: