How old is this

I found this old battery in my house. I think it is from an old radio. We were having a talk over coffee about it, discussing how old it is with no definite answers/agreements on how old it is. Sooooo… We Googled it with no success. Any ideas?.. Is it dangerous to have around?..

I found and interesting article here:

antiqueradio.org/bsupply.htm

“All early radios used batteries—as many as three batteries in the earliest sets. These batteries were known as A, B, and C”

Here is one similar for sale on Ebay:

ebay.ca/itm/Vintage-1940-Eve … 391wt_1397

It said’s vintage 1940’s…

Thank You…