This is a rare Frank Lloyd Wright Buffalo Pottery mug, often associated with the Graycliff Estate near Buffalo, New York. The mug features the design of the Iconic Diamond Window design, from the Graycliff Estate. It is exclusive to Graycliff. This mug is also part of a collection of ceramics designed by Frank Lloyd Wright. They are produced by buffalo pottery. It is in excellent condition. See pictures. Buyer to pay for shipping. Payment to be received within three days of the auction close. Smoke and pet free home.