The Front & Back clock is a clock that only a minimalist would love. This clock from Wrong Objects Design uses its own batteries as hands. Run out of batteries and you've got double the trouble.
I see a few problems with the design of the Front & Back clock. First and foremost, how can you tell time accurately without numbers? Regardless of whether this can actually be used as a functioning clock or not, it is still undoubtedly an interesting conversation piece. Three cheers for minimalism!