I have to say I am a bit confused by this posting. I left it alone because I thought it was a bit outside my area of interest.
I also thought Stecci would answer it. He posted this site some time ago:
http://www.ae-design.ch/e-book-s.html#a1652
I didn't download the book, but I did notice the city mark. Then after a bit Theo posted the city of Feldkirch, so I didn't have to admit I didn't pay to download the book. I should explain I have almost no interest in Austrian silver. Then I saw the resolution, with which I disagree respectfully. The maker's mark doesn't look at all the same. I think I would see if Stecci will respond to a message, he didn't the last one I sent on another subject.
I don't know the maker, but I would bet on Feldkirch.
Maurice