Two things....
1) In dealing with signatures I have found there is a huge difference between something signed in a persons traditional autograph style and a name engraved on something to prove ownership. They have never matched in my experience.
2) If you are really curious I would simply send an email to the hotel that he owns and manages along with a picture of the clasp. He will either fail to respond or he will remember it and give you what he remembers about it. I've done this on many occasions and the response has always been good and respondents have always viewed my questions positively.
I think if you sent your inquiry here it would find its way to him.
http://www.hotelkarlschranz.com/en/hotel-arlberg/karl-schranz.htmlClick to expand...