This Clock is known as Rolling Ball Clock. It was invented by Sir W.Congreve @1808. This is the modern reproduction rolling ball clock similar to Congreve clock, late 20th century. It has a fusee chain movement which runs for 8-days. The Clock works on a rolling ball on a platform which tilts both the sides and keeps the ball rolling. A ball rolls on a platform on a zigzag track, strikes the lever at the end of the table, triggers the lever which tilt’s the platform and again the ball starts rolling the other side. On each side when the ball hits the lever it changes the time in seconds. It has 3-dials second, minute and hour. The entire clock is covered with 5- side glass.