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This is a concept watch from Nicolas Meiresonne, but it won`t give you the exact time. It gives you a "perception" of time, by cycling through a variety of pretty colors. Green and blue in the morning, while yellow and orange mean noon and red and purple show that it is evening. I think after wearing this for awhile, you could glance at the watch and know exactly what time of day it is pretty easily. It wouldn`t be good for those that have to be places at certain times though! It does have the ability to set a timer, but it is only for certain segments of time, not exact times. It is more for looks and a piece to talk about than for functionality in my opinion.
Image Source: http://www.slipperybrick.com/2008/12/torus-concept-watch-adds-some-color-to-time/#more-15406