The Tread 1 from Californian watch manufacturer DEVON is a busy little piece of wrist candy. Official retailer Watchismo sez:
The exposed movement is a mesmerizing display of the patented interwoven system of conveyor belts. This series of belts includes critical elements that allow the optical recognition system to know every belt position at all times.
The Tread 1 Watch features four internal 2-micron thin belts that spin within the case to display the time. It’s powered by a lithium polymer rechargeable cell that is charged by wireless induction.
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The watch, on the other hand, costs between $17,500 and $19,500 depending on finish.