If youd like a new spin on an old product, you may want to look into the Invotis Wall Gear Clock. Instead of having hands that trail tirelessly around a pivotal point, a giant gear with all the hours will instead move around a small black arrow, which will indicate the time. All of the gears that make the large gear move are exposed, but that only adds to its appeal.
This is definitely an interesting approach to a regular old wall clock, but it certainly has its own charm. It is 22 in diameter and 26 inches high, and would be a lovely centerpiece for any open wall or mantle. You will need 2 D batteries, which are not included, but the clock itself can be found for about $125 online.