Unless the violin has been in your family for many generations, and unless you have certificated papers for it-- it is almost guaranteed the label is a fake on a violin bearing a famous-maker label. Generally one looks at the label as the very last thing, in an appraisal.

A friend's mother recently passed away. She'd owned this violin most of her life, and played it regularly, but had never had it appraised. The heirs had it appraised for the estate by a local luthier--he apparently only went by the label and said the violin was worth up to $100,000! The heirs immediately bought a stout safe and put the violin in it, while contemplating what to do next. Eventually they learned they should get an appraisal from a genuine skilled appraiser (who would charge them for the appraisal). They made an appointment with a skilled appraiser in a large city some distance away--he didn't spend more than a minute looking at it--he could immediately tell just from the construction that the violin wasn't anything valuable. He said almost all labels on claimed-expensive violins, unless there are certified papers that have followed the violin throughout its life, are fake, and to never believe the label on a claimed-expensive violin without much more scrutiny. (The violin turned out to be German-made and was a decent one, and the appraisal was for several thousand dollars.) The heirs were actually relieved to learn this, as they were wondering what they should do with a very valuable violin. Now they could relax, and somone in the family who plays violin would be able to keep it and continue playing it in her mother's memory and not worry about it being valuable.

Unfortunately that's the way things are in the violin world, and I believe have been that way for hundreds of years.