By Bulova from the Frank Lloyd Wright Collection. Frank Lloyd Wright designed and patented a series of 45 prisms of clear glass tiles to refract light for the Luxfer Prism Company building in Buffalo, New York, 1896-97. The front and rear walls of the building were made entirely of these Luxfer Prisms. This clock incorporates two of the famous prism designs, including the flower design that was the only one that was ever actually produced. Case is made of individual bronze finished rods. The dial has raised hour markers on a cream background with a shadow background design. Smooth sweep second hand. Requires (1) AA battery, not included.