I know a lot about the Kochersperger, I am very interested in what you have. I know that the first immigrant was Johann Martin Kochersperger, born in Rittershofen, Alsace, France in 1752. I have the complete genealogy going back to the mid 1600's. Johann Martin (he went simply by the name of Martin) came to Philadelphia about in 1770. One of his sons was Henry, I was not aware that Henry had a double name "Martin Henry". He also had a son called Martin Jr. who lived at Gray's Ferry. There were other sons, notably Jacob, John (grandfather of department store king John Wanamaker) and also several daughters.
I would be most interested in the documents you have.