When was this marble made? & by who? thank you for your answers!

[Unitedstatesofamerica1]

 

[tamrock]

I believe there is a marble forum here at TN, but I don't think it gets a lot of visitors. For all I know of marbles, I'm going to say it was made by Akro Glass Co. 1930s-40s. They were known for slag glass and marbles. Thats just a guess on my end.