This type has an elongated shape globally like Napoleon or Humpback clock. But it is distinctive. Its middle part, where the movement and the dial are, has the shape of a drum or tambour inserted in the middle of the elongated base. This type of case has two parts: a base and a tambour containing the movement and the dial. Physically, it is possible to detach the tambour from its base. So, let’s name it a Tambour clock.