After reading your comment, I researched old farm equipment weights... and I have discovered it is an International Harvester McCormick F12 F 14 Front Frame Tractor Weight. Thanks so much, very helpful!
I inherited this from my Grandfathers farm in Southern Illinois. It was housed in his barn and as children we would use it to crack open black walnuts. I always thought it was an anvil but it has holes like a swage... I don't know the difference and I have looked and looked - but can not find a photo of anything similar to this. It is very old and very heavy. Can anyone tell me exactly what it is and/ or the value of a piece like this? Thanks