Information about HG-300

I have a Hohner HG-300 limited edition that according to the label was made in January 1977. There is a stamp inside with a signature. What I am wondering is based on the serial number and signature, would you know where it was made and who is the person on the signature? I wish the word was all on the label but unfortunately, it is not. I appreciate any help on understanding the origin of my guitar that I have had since I was 15. It is still a beautiful guitar to play.