This is a professional-level Charles Jean-Baptiste Collin-Mezin violin, Stradivari model, made in Paris in 1900. The label references Exposition Universelle Paris 1900 Grand Prix and the maker’s Paris address, with the maker’s signature inside the lower treble bout. It features maple construction with a two-piece quarter-sawn back and includes an instrument case. Key dimensions are 359 mm back length, 113 mm upper bout, 113 mm center bout, and 205 mm lower bout. The instrument is by a reputable maker and appears intended for serious/professional use.