old iron, what is it??

I was kicking thru the grass behind the house a bit this afternoon, came up with several old pieces of "stuff" a 1960 minnesota liscence plate. A vintage splitting maul head and axe head which I will put back into service making wood for the cookstove. I also found this...
Looks primitive..this neighborhood was settled in about 1884. Shame its cracked..

Looks primitive..this neighborhood was settled in about 1884. Shame its cracked..
