No , it could have wore off , or maybe he just never put his name on it. He built more than one rifle. I would bet you a beer or bourbon on that. There may be as many unsigned rifles as signed. I have taken pictures of the signature area & magnified them & sometimes seen pieces of a signature that I could not see with the naked eye. Thanks for sharing this with us. Someone on here will have some insight on your rifle, it may take a few days.