Several years ago, another Shellhammer researcher sent me photos of headstones from Zion Cemetery at Zion Lutheran Church in West Penn Township, Schuylkill Co. PA. My ancestor, Phillip Jacob is buried there and is the son of Hans Gerg. I have a photograph of his head stone. There are several other Shellhammer family members bured there. It is believe that the grave of Hans Gerg is literally under Zion Luthern Church, so there is no head stone to see.
I can dig around a bit and see if I can find those photographs, if you are interested.