French JTL Medio Fino Violin made in Mirecourt, France

JTL stands for Jérôme Thibouville-Lamy & Cie a musical instrument making company in France formed by Louis Emile Jérôme Thibouville and Marguerite Hyacinthe Lamy at around 1900’s. They made a connection between their family through their marriage and business. The company was based in Mirecourt, France, and later become one of the world’s most powerful unions in the history of violin making.