Yeah it is a cleat somebody is trying to sell as an anvil. pfffffff
I got this one.
Attachment 143974
Had to drive 200 miles to get it but is nice. 110 lb. Wilkinson from Dudley, England. I'd date it circa mid-1800s. It was bought new for the Duvall Copper mine in Kingman Arizona. When the mine closed a scraper bought it. I got it from his son.
It's going to get a new stand tomorrow.