I believe that your grandfather came to the U.S. when he was eighteen, which would be about 1909. I don't know which port he came through but I would guess it was either New York or Boston. He was a naturized U.S. Citizen so there might some information in those records but I don't know when he became a citizen. Hope this helps you. I will forward a brief history of his activities that I know about from about 1929 forward by e-mail.