Large Ingot found in my yard

[djm of PA]

took the kids outside to play a little bit, so i decided to swing the detector. didn't get much detecting in, but did manage a Schwinn SpitFire tag, a '76 penny, a bolt of some sort with a spring in it and then the interesting find, a large ingot with SJ stamped into it. I'm grounded enough to think lead...but I dream enough to hope silver
Took a knife and knicked the top, shiny inside, but lead would do that too from what I understand. Either way, not what I was expecting at 8inches in the yard!~

 

[texjim]

nice pad.. when can i start moving my stuff in?