A very interesting piece as it's made from a number of race car components.  The face is made up from roller bearings from the Ford GT race car, the ball bearings are from the Mazda RT24-P and the brass swarf comes from making engine components from the Aston Martin Valkyrie track car.  Quite the mixed bag!  The bangle casing is Rhodium plated and the sides have been covered in genuine, soft, black leather which has been stoned ground to finish.  Quite the statement piece offering a variety of cars, colours and materials.