I concur with dewain. You need to have it looked at by a professional
.......The label, whether genuine or false, in Latin inscription is Antonius Stradivarius Cremonensis Faciebat Anno [date]. This indicates the maker (Antonio Stradivari), the town (Cremona), and "made in the year," followed by a date that is either printed or handwritten. Copies made after 1891 should have a country of origin printed in English at the bottom of the label as was required after 1891 by the U.S. on imported goods.
Inexpensive copies were manufactured by great Italian artists. Placing a label with a well known master's name was not intended to deceive the purchaser but rather to indicate the model around which an instrument was designed. At that time, the purchaser knew he was buying an inexpensive violin, but as people are again rediscovering these instruments, the knowledge of where they came from is lost, and the labels can be misleading. Chances of having an authentic Strad is nil, but it should be looked at by someone with proper knowledge........Re
spectfully.........
.Tim B)