who is cbc and *I* brass head stamp on 357mag?

I is independence brass. I'm not sure on the CBC but i have a bunch of both in .40 cal. I want to know myself.
Bill

Companhia Brasileira de Cartuchos

There's a great site that has cataloged all the small arms headstamps:
http://cartridgecollectors.org/headstampcodes.htm

Check it out

thanks for the link. and welcome to ar.
dave