Concept designer Martin Hajek has posted new iWatchS and iWatchC concepts. Both feature a new clock face and of course the iWatchC has a plastic band.
Nobody knows what the iWatch will look like, not even the infamous Sonny Dickson has leaked any parts yet everyone knows about the production problems which Apple purportedly is facing.
All I do know for sure is that I had little problems visualizing the iWatch[C] and iWatch[S] on a wrist.
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You might also want to check out the original concept.