Also a related interested read: http://skeptoid.com/episodes/4184 http://skeptoid.com/episodes/4184 "... Most archaeologists agree that this particular device

Also a related interested read: http://skeptoid.com/episodes/4184 http://skeptoid.com/episodes/4184 "... Most archaeologists agree that this particular device was neither unique nor the first of its kind. Two factors contribute to this: First, its design is quite refined, which is not consistent with a prototype. Second, an object as expensive and complex as this would typically be made in a series in order to recover the costs of design. Why, then, are its siblings not found? ..."