... master designer behind the most creative and valuable leaded glass lamps produced by Tiffany Studios.Tiffany's first business venture ... . The Favrile category, which means handcrafted, identifies the first lamps Tiffany made with this label. His initials LCT, later replaced ... , rectangles, and ovals to form these patterns for these lamps. Next is the Transition to Flowers group, which is subdivided ...