Best case material for a minute repeater?

[PJ S]

Originally Posted by MILGAUSS88

I see you are from the UK, and probably have never been to the US Midwest, so I will forgive you being uninformed.
Cast iron Bells were used at virtually every one room School, small Prairie Church and a lot of farms.
They are over a hundred years old now and you can still find thousands of them. And they still work.

I was probably thinking more of pig iron, but nonetheless, I’d obviously forgotten anything I once knew about CI bells from the distant past.
Thanks for filling the gap in my knowledge.