I've owned this violin for decades, and had it restored about 10 years ago. It's never had a label as long as I've owned it, but has been described as "Possibly Austrian, mid-1800s".
I was showing it to a friend over the weekend, and he commented that it reminded him of some fiddles he's seen made by Leopold Widhalm (1722-1775). The online photos I've looked at lend some credence to this but wondered the opinion of those here - I'm always amazed by the knowledge base here.
http://www.karlwinkler.com/Old%20Violin.jpg
Thanks!